\begin{thebibliography}{1}

\providecommand{\natexlab}[1]{#1}
\providecommand{\url}[1]{\texttt{#1}}
\providecommand{\urlprefix}{URL }
\providecommand{\eprint}[2][]{\url{#2}}

\bibitem[{Chierichetti et~al.}(2008){Chierichetti, Lattanzi, Mari \& Panconesi}]{Chierichetti_etal2008} Flavio Chierichetti, Silvio Lattanzi, Federico Mari, and Alessandro Panconesi. "On Placing Skips Optimally in Expectation." In \textit{Web Search and Web Data Mining (WSDM 2008)}, edited by M. Najork, A. Z. Broder and S. Chakrabarti, 15--24. Acm, 2008. DOI: 10.1145/1341531.1341537.

\end{thebibliography}

