Hans-Joachim Böckenhauer Luca Forlizzi Juraj Hromkovic Joachim Kneis Joachim Kupke Guido Proietti Peter Widmayer Reusing Optimal TSP Solutions for Locally Modified Input Instances. 251-270 2006 IFIP TCS http://dx.doi.org/10.1007/978-0-387-34735-6_21 conf/ifipTCS/2006 db/conf/ifipTCS/ifipTCS2006.html#BockenhauerFHKKPW06