Have you tried not specifying a `biblio-style` YAML key and setting instead:``` yamlbiblatexoptions:- bibstyle=ext-authortitle- citestyle=ext-authoryear```From Pandoc's LaTeX template (https://github.com/jgm/pandoc-templates/blob/master/default.latex, line 400) you'll see that the command is generated by:\usepackage[$if(biblio-style)$style=$biblio-style$,$endif$$for(biblatexoptions)$$biblatexoptions$$sep$,$endfor$]{biblatex}Which means that a `biblio-style=XXX` is converted to to the option \usepackage[style=XXX,]{biblatex}, but arbitrary biblatexoptions are reproduced as is.Best,On Sunday, April 23, 2023 at 6:39:00 PM UTC+1 Guido Milanese wrote:I have been using pandoc + LaTeX + Biblatex for several years now as my normal tool for scholarly writing, and I find the biblatex filter really excellent. For some reasons, the style of a journal requires a particular biblatex style "mixture":```citestyle=ext-authoryear, bibstyle=ext-authortitle```For a similar use, see e.g. https://tex.stackexchange.com/questions/433643/customizing-biblatex-authoryear-labels-in-bibliography-and-format-of-editor.Question: while I normally write, in my YAML header:```biblio-style: <required style>```I was not able to find a YAML instruction suitable for this particular need, i.e. two searate style for citation and for the final bibliography. Not a big issue, since I can edit the TeX file with s simple sed script, but I was just curious to know if it is possible to incorporate this instruction within a YAML header.Many thanks for everything.guido (Italy)