Sami Khuri A Numerical Algorithm for Solving Troesch's Problem. 493-498 2003 80 Int. J. Comput. Math. 4 http://taylorandfrancis.metapress.com/openurl.asp?genre=article&issn=0020-7160&volume=80&issue=4&spage=493 db/journals/ijcm/ijcm80.html#Khuri03