5[4]Kamin M, Li L. Subcontracting, coordination, flexibility, and production smoothing in aggregate planning[J]. Management Science, 1990; 36(11): 1 352-1 363.
6[5]Mieghem J A. Coordinating investment, production and subcontracting[J]. Management Science, 1999; 45(7): 954-971.
7[6]Lippman S A, McCardle K F. The competitive newsboy[ J]. Operations Research, 1997; 45: 54-65.
8[2]Gupta M, Zhender D. Outsourcing and its impact on operations strategy[J]. Production and Inventory Management Journal,1994; 94: 691-719.
9[3]Quinn J B, Hilmer F G. Strategic outsoureing[J]. Sloan Management Review, 1994; summer: 43-55.