\begin{thebibliography}{1}

\bibitem{spanner13}
James~C. Corbett, Jeffrey Dean, Michael Epstein, Andrew Fikes, Christopher
  Frost, J.~J. Furman, Sanjay Ghemawat, Andrey Gubarev, Christopher Heiser,
  Peter Hochschild, Wilson Hsieh, Sebastian Kanthak, Eugene Kogan, Hongyi Li,
  Alexander Lloyd, Sergey Melnik, David Mwaura, David Nagle, Sean Quinlan,
  Rajesh Rao, Lindsay Rolig, Yasushi Saito, Michal Szymaniak, Christopher
  Taylor, Ruth Wang, and Dale Woodford.
\newblock Spanner: Google: Globally distributed database.
\newblock {\em ACM Transaction on Computing Systems}, 31(3):8:1--8:22, August
  2013.

\bibitem{nfa85}
Giangiacomo Gerla and Robert Tortora.
\newblock Normalization of fuzzy algebras.
\newblock {\em Fuzzy Sets Systems}, 17(1):73--82, September 1985.

\bibitem{KT06}
Jon Kleinberg and Eva Tardos.
\newblock {\em {Algorithm design}}.
\newblock Pearson, Boston, MA, 2006.
\newblock International edition.

\bibitem{gsn07}
Giri Narasimhan and Michiel Smid.
\newblock {\em Geometric Spanner Networks}.
\newblock Cambridge University Press, New York, NY, USA, 2007.

\end{thebibliography}
