%&LaTeX
\documentclass{article}

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

\begin{document}

\begin{thebibliography}{1}

\bibitem{Kowalczyk+Twardy2012} Kowalczyk, A., \& Twardy, S. (2012). \textit{Comparison of the water erosion magnitude estimated by the modified USLE methods} (Vol. 121).

\end{thebibliography}

\end{document}

