PRODUCTION PLANNING & CONTROL, vol. 14, no. 7, page. 656 - 661, 2003-10
COMPUTERS & OPERATIONS RESEARCH, vol. 29, no. 8, page. 1009 - 1024, 2002-07
PRODUCTION PLANNING & CONTROL, vol. 11, no. 6, page. 537 - 546, 2000-09