%&LaTeX
\documentclass{article}

\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{textcomp}

\begin{document}

\begin{thebibliography}{1}

\bibitem{Aguilar-Saavedra+Bernabeu2010} Aguilar-Saavedra, J. A., \& Bernabeu, J. (2010). W polarisation beyond helicity fractions in top quark decays. \textit{Nucl. Phys. B}, \textit{840}(1-2), 349--378.

\end{thebibliography}

\end{document}

