Jin Zhou Lu Yu Shingo Mabu Kaoru Shimada Kotaro Hirasawa Sandor Markon Double-deck elevator systems adaptive to traffic flows using Genetic Network Programming. 773-778 2008 IEEE Congress on Evolutionary Computation http://dx.doi.org/10.1109/CEC.2008.4630883 conf/cec/2008 db/conf/cec/cec2008.html#ZhouYMSHM08