Steve Scott Ron Simpson Case-Bases Incorporating Scheduling Constraint Dimensions - Experiences in Nurse Rostering. 392-401 1998 conf/ewcbr/1998 EWCBR http://link.springer.de/link/service/series/0558/bibs/1488/14880392.htm db/conf/ewcbr/ewcbr1998.html#ScottS98