@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"
}


@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"
}

@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"
}