\newlabel{sec:Conclusion and Future Works}{{6}{10}}
\bibstyle{plain}
\bibdata{Example}
-\bibcite{berman04}{Berman and Calinescu, 2004}
-\bibcite{cardei2005improving}{Cardei and Du, 2005}
-\bibcite{cardei2005energy}{Cardei et\nobreakspace {}al., 2005}
-\bibcite{castano2013column}{Casta{\~n}o et\nobreakspace {}al., 2013}
-\bibcite{conti2014mobile}{Conti and Giordano, 2014}
-\bibcite{Deng2012}{Deng et\nobreakspace {}al., 2012}
-\bibcite{deschinkel2012column}{Deschinkel, 2012}
-\bibcite{idrees2014coverage}{Idrees et\nobreakspace {}al., 2014}
-\bibcite{jaggi2006}{Jaggi and Abouzeid, 2006}
-\bibcite{kim2013maximum}{Kim and Cobb, 2013}
-\bibcite{Kumar:2005}{Kumar et\nobreakspace {}al., 2005}
-\bibcite{li2013survey}{Li and Vasilakos, 2013}
-\bibcite{ling2009energy}{Ling and Znati, 2009}
-\bibcite{pujari2011high}{Manju and Pujari, 2011}
-\bibcite{Misra}{Misra et\nobreakspace {}al., 2011}
-\bibcite{Nayak04}{Nayak and Stojmenovic, 2010}
-\bibcite{pc10}{Padmavathy and Chitra, 2010}
-\bibcite{pedraza2006}{Pedraza et\nobreakspace {}al., 2006}
-\bibcite{qu2013distributed}{Qu and Georgakopoulos, 2013}
-\bibcite{raghunathan2002energy}{Raghunathan et\nobreakspace {}al., 2002}
-\bibcite{rossi2012exact}{Rossi et\nobreakspace {}al., 2012}
-\bibcite{varga}{Varga, 2003}
-\bibcite{ChinhVu}{Vu et\nobreakspace {}al., 2006}
-\bibcite{chin2007}{Vu, 2009}
-\bibcite{5714480}{Xing et\nobreakspace {}al., 2010}
-\bibcite{xu2001geography}{Xu et\nobreakspace {}al., 2001}
-\bibcite{yang2014novel}{Yang and Chin, 2014a}
-\bibcite{yangnovel}{Yang and Chin, 2014b}
-\bibcite{Yang2014}{Yang and Liu, 2014}
-\bibcite{Zhang05}{Zhang and Hou, 2005}
-\bibcite{zorbas2010solving}{Zorbas et\nobreakspace {}al., 2010}
+\bibcite{ref17}{1}
+\bibcite{ref19}{2}
+\bibcite{berman04}{3}
+\bibcite{cardei2005improving}{4}
+\bibcite{cardei2005energy}{5}
+\bibcite{castano2013column}{6}
+\bibcite{conti2014mobile}{7}
+\bibcite{Deng2012}{8}
+\bibcite{deschinkel2012column}{9}
+\bibcite{idrees2014coverage}{10}
+\bibcite{jaggi2006}{11}
+\bibcite{kim2013maximum}{12}
+\bibcite{Kumar:2005}{13}
+\bibcite{li2013survey}{14}
+\bibcite{ling2009energy}{15}
+\bibcite{pujari2011high}{16}
+\bibcite{Misra}{17}
+\bibcite{Nayak04}{18}
+\bibcite{pc10}{19}
+\bibcite{pedraza2006}{20}
+\bibcite{qu2013distributed}{21}
+\bibcite{raghunathan2002energy}{22}
+\bibcite{ref22}{23}
+\bibcite{rossi2012exact}{24}
+\bibcite{varga}{25}
+\bibcite{chin2007}{26}
+\bibcite{ChinhVu}{27}
+\bibcite{5714480}{28}
+\bibcite{xu2001geography}{29}
+\bibcite{yang2014novel}{30}
+\bibcite{yangnovel}{31}
+\bibcite{Yang2014}{32}
+\bibcite{Zhang05}{33}
+\bibcite{zorbas2010solving}{34}