Kokolo Ikeda Akihiro Nagaiwa Kei Aoki Shigenobu Kobayashi Independent constraint satisfaction and its application to sewerage system control. 566-573 2003 IEEE Congress on Evolutionary Computation (1) http://dx.doi.org/10.1109/CEC.2003.1299626 conf/cec/2003 db/conf/cec/cec2003-1.html#IkedaNAK03