Latex minimal template (pt-br)

simple_sample.tex

\documentclass[a4paper,11pt]{article}

\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage{lmodern}
\usepackage[brazilian]{babel}
\usepackage{microtype}
\usepackage[alf]{abntex2cite}           % adds abnt alfnumeric citation style

\title{Título aqui}
\author{Nome aqui,\\
    \texttt{email@aqui.br}}
\date{\today}

\begin{document}
\maketitle

%************************************************%
\section{Introdução}
\label{sec:intro}

%************************************************%
\section{Bibliografia Relevante}
\label{sec:biblio}

\bibliographystyle{abntex2-alf}
\bibliography{refs}

\end{document}