\section{Introduction} He say this \cite{Wang:4976389}. He says that \cite{Moghadam:2011:CTA:1984732.1984742}
The paper.bib file should have these references as follows:
@INPROCEEDINGS{Wang:4976389, author={Shuang Wang and Offutt, J.}, booktitle={Software Testing, Verification and Validation Workshops, 2009. ICSTW '09. International Conference on}, title={Comparison of Unit-Level Automated Test Generation Tools}, ... @inproceedings{Moghadam:2011:CTA:1984732.1984742, author = {Moghadam, Iman Hemati and \'{O} Cinn\'{e}ide, Mel}, title = {Code-Imp: a tool for automated search-based refactoring}, ...
Then to create the actual output, run the following in sequence:
pdflatex paper.tex bibtex paper.aux pdflatex paper.tex pdflatex paper.tex