\begin{thebibliography}{1}

\bibitem{Butler}
Sathappan Muthiah, Anil Vullikanti, Achla Marathe, Kristen Summers, Graham
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  Ramakrishnan, Patrick Butler, Rupinder~Paul Khandpur, Parang Saraf, Nathan
  Self, Alla Rozovskaya, Liang Zhao, Jose Cadena, and Chang-tien Lu.
\newblock {EMBERS at 4 years: Experiences operating an Open Source Indicators
  Forecasting System}.
\newblock {\em Proceedings of the 22nd ACM SIGKDD International Conference on
  Knowledge Discovery and Data Mining - KDD '16}, pages 205--214, 2016.

\end{thebibliography}