Imdat Kara Bahar Yetis Kara M. Kadri Yetis Energy Minimizing Vehicle Routing Problem. 62-71 2007 conf/cocoa/2007 COCOA http://dx.doi.org/10.1007/978-3-540-73556-4_9 db/conf/cocoa/cocoa2007.html#KaraKY07