%&LaTeX
\documentclass{article}

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

\begin{document}

\begin{thebibliography}{1}

\bibitem{Christiaens_etal2019} {\textquotedblleft}\textit{Urine nitrification with a synthetic microbial community}{\textquotedblright}. Christiaens MER, De Paepe J, Ilgrande C, De Vrieze J, Barys J, Teirlinck P, Meerbergen K, Lievens B, Boon N, Clauwaert P, Vlaeminck SE, Systematic and applied microbiology \textbf{42}, Unsp 126021 (2019).   http://doi.org/10.1016/J.SYAPM.2019.126021

\end{thebibliography}

\end{document}

