%&LaTeX
\documentclass{article}

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

\begin{document}

\begin{thebibliography}{1}

\bibitem{Tian_etal2009} {\textquotedblleft}\textit{Fabrication and characterization of functionally graded Ni-Ti multilayer thin films}{\textquotedblright}. Tian H, Schryvers D, Mohanchandra KP, Carman GP, van Humbeeck J, Functional materials letters \textbf{2}, 61 (2009).   http://doi.org/10.1142/S1793604709000570

\end{thebibliography}

\end{document}

