4Shanthikumar J G, Sumita U. Approximations for the time spent in dynamic job shop with applications to due date as- signment I-J]. International Journal of Production Research, 1988, (26) : 1329-1352.
5Karmarkar U. Manufacturing lead times, order release and capacity loading//Graves S, Rinnooy Kan A, Zipkin P(eds) : Handbooks in Operations Research and Management Science, Vol 4, Logistics of Production and Inventory [M]. Amster- dam: North-Holland, 1993.