Philipp Rohlfshagen Xin Yao The Dynamic Knapsack Problem Revisited: A New Benchmark Problem for Dynamic Combinatorial Optimisation. 745-754 2009 EvoWorkshops http://dx.doi.org/10.1007/978-3-642-01129-0_84 conf/evoW/2009 db/conf/evoW/evoW2009.html#RohlfshagenY09