%&LaTeX
\documentclass{article}

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

\begin{document}

\begin{thebibliography}{5}

\bibitem{Liu_etal2014} Liu, X., Lehtonen, H., Purola, T., Pavlova, Y., \& R{\"o}tter, R. P., T. (2014). Dynamic economic modelling of crop rotation with adaptation practices..

\end{thebibliography}

\end{document}

