\citation{Zhang05}
\citation{idrees2014coverage}
\citation{pedraza2006}
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\citation{varga}
\bibcite{idrees2014coverage}{Idrees et\nobreakspace {}al., 2014}
\bibcite{li2013survey}{Li and Vasilakos, 2013}
\bibcite{ling2009energy}{Ling and Znati, 2009}
-\bibcite{Sudip03}{Misra et\nobreakspace {}al., 2009}
\bibcite{Nayak04}{Nayak and Stojmenovic, 2010}
\bibcite{pedraza2006}{Pedraza et\nobreakspace {}al., 2006}
\bibcite{qu2013distributed}{Qu and Georgakopoulos, 2013}