%&LaTeX
\documentclass{article}

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

\begin{document}

\begin{thebibliography}{1}

\bibitem{Trnka_etal2014} Trnka, M., R{\"o}tter, R. P., Ruiz-Ramos, M., Kersebaum, K. C., Olesen, J. E., {\v Z}alud, Z., et al. (2014). Adverse weather conditions for European wheat production will become more frequent with climate change. \textit{Nat. Clim. Change}, \textit{4}(7), 637--643.

\end{thebibliography}

\end{document}

