main.tex

\documentclass[10pt,a4paper,twocolumns]{proc}

%--------------------------------------------
% Input and language
%--------------------------------------------
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage[spanish,british]{babel}

%--------------------------------------------
% License
%--------------------------------------------
\usepackage{ccicons}
\usepackage[type={CC},modifier={by-nc-sa},version={4.0},imagemodifier={-eu}]{doclicense}

%--------------------------------------------
% Graphics
%--------------------------------------------
\usepackage{graphicx}
% \usepackage[pdftex]{graphicx}
\usepackage{xcolor} % Required for specifying colors by name

%--------------------------------------------
% Hyperlinks
%--------------------------------------------
\usepackage{hyperref}
\hypersetup{
	colorlinks=true,       % false: boxed links; true: colored links
	linkcolor=black!60!red,          % color of internal links (change box color with linkbordercolor)
	citecolor=black!70!green,        % color of links to bibliography
	filecolor=black,         % color of file links
	urlcolor=black        % color of external links
}

%--------------------------------------------
% Nice tables
%--------------------------------------------
\usepackage{booktabs,multirow,makecell,dcolumn,longtable}
\newcolumntype{d}{D{+}{ \pm }{-1}}

%--------------------------------------------
% Nice equations
%--------------------------------------------
\usepackage{textgreek,amsmath,nicefrac}

%--------------------------------------------
% Images and bibliography (with oxford comma)
%--------------------------------------------
\usepackage{caption,cleveref}
\newcommand{\creflastconjunction}{, and\nobreakspace}
\usepackage[style=apa6,sorting=nyt,refsection=section,uniquename=false]{biblatex}
\defbibheading{bibempty}{}

\renewcommand*{\bibfont}{\footnotesize}

\newcommand\BibTeX{{\rmfamily B\kern-.05em \textsc{i\kern-.025em b}\kern-.08em
T\kern-.1667em\lower.7ex\hbox{E}\kern-.125emX}}

%--------------------------------------------
% Use french spacing
%--------------------------------------------
\frenchspacing

%--------------------------------------------
% Formatting
%--------------------------------------------
\newcommand{\authors}[1]{\emph{\footnotesize #1}}
\newcommand{\affiliations}[1]{\\ \emph{\scriptsize #1} \\}


\title{Brainhack Proceedings}
%\subtitle{subtitle}

% Abilitate subfiles
\usepackage{subfiles}

% Bibliography & figures
\graphicspath{{images/}}
\addbibresource{\subfix{references/references.bib}}

\begin{document}

\subfile{summaries/template.tex}

\end{document}