Jitian Xiao Chiou Peng Lam Huaizhong Li Jun Wang Reformulation of the generation of conformance testing sequences to the asymmetric travelling salesman problem. 1933-1940 2006 conf/gecco/2006 GECCO http://doi.acm.org/10.1145/1143997.1144318 db/conf/gecco/gecco2006.html#XiaoLLW06