@book{grillet,
author = "Pierre Antoine Grillet",
title = "Abstract Algebra",
edition = "second",
year = "2007",
publishers = "Springer",
series = "Graduate Texts in Mathematics",
address = "New York"
}

@book{robinson,
author = "Derek J. S. Robinson",
title = "A Course in the Theory of Groups",
edition = "second",
year = "1996",
publishers = "Springer",
series = "Graduate Texts in Mathematics",
address = "New York"
}

@book{cgt,
author = "Roger C. Lyndon and Paul E. Schupp",
title = "Combinatorial Group Theory",
series = "Classics in Mathematics",
publishers = "Springer",
address = "Berlin",
year = "2001"
}

@book{magnus,
author = "Wilhelm Magnus and Abraham Karrass and Donald Solitar",
title = "Combinatorial Group Theory: presentations of Groups in Terms of Generators and Relations",
publishers = "Dover",
year = "2004",
address ="New York"
}

@unpublished{millerIII,
title = "Combinatorial Group Theory",
author = "Charles F. {{Miller III}}",
year = "2004"
}

@incollection{millerIII-article,
title = "Some presentations of the trivial group",
author = "Charles F. {{Miller III}} and Paul E. Schupp",
booktitle = "Groups, Languages and Geometry. 1998 AMS-IMS-SIAM Joint Summer Research Conference on Geometric Group Theory and Computer Science, July 5-9, 1998, Mount Holyoke College",
year = "1999",
publisher = "American Mathematical Society",
series = "Contemporary Mathematics",
editors = "Robert H. Gilman",
volume = "250",
pages = "113-115"
}

@book{meier,
title = "Groups, Graphs and Trees. An Introduction to the Geometry of Infinite Groups",
author = "John Meier",
publishers = "Cambride University Press",
series = "London Mathematical Society Student Texts",
volume = "73",
address = "Cambridge",
year= "2008"
}

@book{crm,
title = "The Geometry of The Word Problem for Finitely Generated Groups",
author = "Noel Brady and Tim Riley and Hamish Short",
publishers = "Springer",
year = "2007",
address = "Berlin",
series = "Advanced Courses in Mathematics CRM Barcelona"
}

@article{novikov,
 author = "P. S. Novikov",
 title = "On the algorithmic unsolvability of the word problem in group theory",
 journal = "Proceedings of Steklov Mathematical Institute",
 year = "1955",
 volume = "44",
 pages = "1-145",
 note = ". Traducció anglesa a l'American Mathematical Society Translations (2) 9 (1958), 1-122"
}

@article{stillwell,
title = "The Word Problem and the isomorphism problem for groups",
author = "John Stillwell",
journal = "Bulletin (New Series) of the American Mathematical Society",
volume = 6,
number = 1,
year = 1982,
month = "Jan"
}

@incollection{millerIIIa2,
author = "Charles F. {{Miller III}}",
title = "Decision problems for groups: survey and reflections",
booktitle = "Algorithms and Classification in Combinatorial Group Theory",
year = "1992",
publisher = "Springer-Verlag",
address = "Berlin",
editor = "Gilbert Baumslag and Charles F. {{Miller III}}",
pages = "1-59",
series = "MSRI Publications",
volume = 23
}

@incollection{bridson-tutorial,
 author= "Martin R. Bridson",
 title = {{The geometry of the word problem}},
 booktitle= "Invitations to Geometry and Topology",
 year = "2002",
 publisher = "Oxford University Press",
 editor = "Martin R. Bridson, Simon M. Salamon",
 pages="29-92"
}

@incollection{gersten,
author = "S. M. Gersten",
title = "Isoperimetric and isodiametric functions of finite presentations",
booktitle = "Geometric Group Theory volume 1",
editor = "G. Niblo and M. Roller",
series = "London Mathematical Society Lecture Note Series",
volume = 181,
pages = "79-96",
publisher = "Cambridge University Press",
address = "Cambridge",
year = "1993"
}

@article{dehn,
author = "Max Dehn",
title = "Über unendliche diskontinuierliche Gruppen",
journal = "Mathematische Annalen",
volume = "71",
year = "1912",
pages = "116-144",
note = "Traducció anglesa per J. Stillwell: On infinite discontinuous groups, in {\em Papers on group theory and topology}. Springer-Verlag, 1987"
}

@book{miller-llibre,
author = "Charles F. {{Miller III}}",
title = "On group-theoretic decision problems and their classification",
publisher = "Princeton University Press",
year = "1971",
series = "Annals of Mathematics Studies",
editors = "Phillip A. Griffiths and John N. Mather and Elias M. Stein",
address = "Princeton"
}

@article{seress,
title = "An Introduction to Computational group theory",
author = "Seress, \'{A}[kos]",
journal = "Notices of the American Mathematical Society",
year = "1997",
month = "Jun/Jul",
volume = "44",
number = "6",
pages = "671-679"
}

@misc{openproblems,
author = "Gilbert Baumslag and Alexei G. Myasnikov and Vladimir Shpilrain",
title = "Open problems in combinatorial group theory"
}

@article{sacerdote,
author = "George S. Sacerdote",
title = "Some Undecidable Problems in Group Theory",
journal = "Proceedings of the American Mathematical Society",
volume = "36",
number = "1",
year = "1972",
pages = "231-238"
}

@article{magnus-residualment,
author = "Wilhelm Magnus",
title = "Residually Finite Groups",
journal = "Bulletin of the American Mathematical Society",
year = "1969",
pages = "305-316",
volume = "75"
}

@book{delaharpe,
 author= "de la Harpe, Pierre",
 title = "Topics in Geometric Group Theory",
 publishers = "University of Chicago Press",
 series= "Chicago Lectures in Mathematics",
 year = "2000",
 address = "Chicago"
}

@book{chiswell,
title = "A Course in Formal Languages, Automata and Groups",
author = "Ian Chiswell",
publishers = "Springer",
address = "London",
year = "2009",
series = "Universitext"
}

@misc{whyte,
title = "Quasi-Isometries",
author = "Kevin Whyte",
year = "2007",
address = "Berkeley",
note = "Disponible a www.math.utah.edu/~malone/QI/notes.pdf (darrer accés agost 2009)"
}


@article{dymarz,
author = "Tullia Dymarz",
title = "Billipschitz equivalence is not equivalent to quasi-isometric equivalence for finitely generated groups",
year = "2009",
journal = "arXiv.org",
note = "0904.3764v2"
}

@phdthesis{riley-tesi,
author = "Tim R. Riley",
title = "Asymptotic Invariants of Infinite Discrete Groups",
school = "Corpus Christi College. University of Oxford",
year = "2002",
address = "Hilary Term"
}

@incollection{gromov,
author = "Mikhail Gromov",
title = "Hyperbolic groups",
booktitle = "Essays in Group Theory",
editor = "S. M. Gersten",
pages = "75-263",
publisher = "Springer",
address = "New York",
year = "1987",
series = "Mathematical Sciences Research Institute",
volume = "8",
}

@article{bowditch,
author = "B. H. Bowditch",
title = "A Short Proof That a Subquadratic Isoperimetric Inequality Implies a Linear One",
pages = "103-107",
year = "1995",
journal = "Michigan Mathematical Journal",
volume = "92",
number = "1"
}

@article{olshanskii,
author = "Alexander Y. Ol'shanski\u{i}",
title = "Hyperbolicity of groups with subquadratic isoperimetric inequality",
pages = "281-289",
year = "1991",
journal = "International Journal of Algebra and Computation",
volume = "1",
number = "3"
}

@article{brady-bridson,
author = "Noel Brady and Martin R. Bridson",
title = "There is only one gap in the isoperimetric spectrum",
journal = "Geometric and Functional Analysis",
volume = "10",
number = "5",
year = "2000",
pages = "1053-1070"
}

@article{bridson-ip,
author = "Martin R. Bridson",
title = "Fractional isoperimetric inequalities and subgrup distorsion",
journal = "Journal of the American Mathematical Society",
volume = "12",
year = "1999",
number = "4",
pages = "1103-1118"
}

@article{brady-forester,
author = "Noel Brady and Max Forester",
title = "Density of Isoperimetric spectra",
journal = "arXiv.org",
year = "2008",
note = "0812.1036v1"
}

@article{snowflake,
author = "Noel Brady and Martin R. Bridson and Max Forester and Krishnan Shankar",
title = "Snowflake groups, {{P}}erron-{{F}}robenius eigenvalues and isoperimetric spectra",
journal = "Geometry \& Topology",
volume = "13",
number = "1",
year = "2009",
note = ". Disponible a l'arXiv.org: 0608155v2."
}

@article{sapir-birget-rips,
author = "Mark Sapir and Jean-Camille Birget and Eliyahu Rips",
title = "Isoperimetric and isodiametric functions of groups",
journal = "Annals of Mathematics",
volume = "156",
number = "2",
year = "2002",
pages = "345-466",
note =". Disponible una versió preliminar a l'arXiv.org. 9811105v1"
}

@article{birget-et-al,
author = "Jean-Camille Birget and Alexander Y. Ol'shanski\u{i} and Eliyahu Rips and Mark Sapir",
title = "Isoperimetric functions of groups and computational complexity of the word problem",
journal = "Annals of Mathematics",
volume = "156",
number = "2",
year = "2002",
pages = "476-518"
}

@incollection{quenell,
author = "Gregory Quenell",
title = "Combinatorics of free-product graphs",
booktitle = "Geometry of the spectrum. 1993 Joint Summer Research Conference on Spectral Geometry, July 17-23, 1993, University of Washington, Seattle",
year = "1994",
publisher = "American Mathematical Society",
series = "Contemporary Mathematics",
editors = "Robert Brooks and Carolyn Gordon and Peter A. Perry",
volume = "173",
pages = "257-282"
}














@article{bridson,
 author = "Martin R. Bridson",
 title = "On the geometry of normal forms in discrete groups",
 journal = "Proceedings of the London Mathematical Society",
 year = "1993",
 volume = "67",
 pages = "595-616"
}

@article{riley,
author = "Tim R. Riley",
title = "The geometry of groups satisfying weak almost-convexity or weak geodesic-combability conditions",
journal = "Journal of Group Theory",
year = "2002",
volume= 5,
pages = "513-525"
}

@book{epstein,
 author = "Epstein, David B. A. and J. W. Cannon and D. F. Holt and S. V. F. Levy and M. S. Paterson and W. P. Thurston",
 title = "Word processing in groups",
 publishers="Jones and Barlett Publishers",
 year= "1992"
}