# Customization of citation and bibliography styles with biblatex

I am trying to change the citation style in the text so that if it is an author number equal to 2 that the "and" is put between their names (eg: Tempkin and Pyzhev, 1940) (not the semicolon (;) as in this case).

Also, I would like in the bibliography that the author names appear in lowercase with the initials in uppercase (eg: Tempkin, M and Pyzhev, V, 1940. Heavy metals removal and isotherms study.Acta Physiochim USSR. Vol. 12, pp. . 217–22.).

Here is my short code (example):

\documentclass{article}
\usepackage[utf8]{inputenc}

\usepackage[
backend=biber,
style=iso-authoryear,
maxcitenames=2,
sorting=nty,
]{biblatex}

\begin{document}

\maketitle

\section{Introduction}

Example of my citation \parencite{tempkin1940}.

\printbibliography
\end{document}


here is my BiblioFile.bib :

@article{tempkin1940,
title={Heavy metals removal and isotherms study},
author={Tempkin, M and Pyzhev, V},
volume={12},
pages={217--22},
year={1940}
}


The delimiter between names is called finalnamedelim between the second-to-last and last name and multinamedelim otherwise.

For the name format biblatex-iso uses the command \familynameformat to format names in all caps. If we redefine this macro we can suppress the caps.

\documentclass{article}
\usepackage[utf8]{inputenc}

\usepackage[
backend=biber,
style=iso-authoryear,
maxcitenames=2,
]{biblatex}

\DeclareDelimFormat{finalnamedelim}{%
\ifnumgreater{\value{liststop}}{2}{\finalandcomma}{}%

\DeclareDelimAlias[bib]{finalnamedelim}{multinamedelim}

\renewcommand{\familynameformat}[1]{#1}

\begin{document}
Lorem \autocite{sigfridsson}.

\printbibliography
\end{document}


It wasn't clear to me from the question whether you wanted the "and" only in citations or also in the bibliography. If you also want it in the bibliography just remove the two lines

\DeclareDelimFormat[bib]{multinamedelim}{\addsemicolon\space}
\DeclareDelimAlias[bib]{finalnamedelim}{multinamedelim}


in the code above.

• Big thanks, I will go through this solution. Next, I will come back to you. Jun 27 at 14:25