+\citation{Misra}
+\citation{yang2014novel}
+\citation{Kumar:2005}
+\citation{kim2013maximum}
+\citation{Deng2012}
+\citation{ling2009energy}
+\citation{jaggi2006}
+\citation{chin2007}
+\citation{pc10}
+\citation{yangnovel,ChinhVu,qu2013distributed}
+\citation{cardei2005improving,zorbas2010solving,pujari2011high}
+\citation{berman04,zorbas2010solving}
+\citation{cardei2005energy,5714480,pujari2011high,Yang2014}