Dharmendra Kumar Gupta A New Algorithm to Solve Vehicle Routing Problems (VRPs). 267-274 2003 80 Int. J. Comput. Math. 3 http://taylorandfrancis.metapress.com/openurl.asp?genre=article&issn=0020-7160&volume=80&issue=3&spage=267 db/journals/ijcm/ijcm80.html#Gupta03