FEDERGRUEN A, ZHENG Y S. An efficient algorithm for computing an optimal ( r, Q ) policy in continuous review stochastic inventory systems[J]. Operations Research, 1992, 40(4):808-813.
[2]
LAU A H L, LAU H S, ROBINSON L W. Convenient expressions for computing the exact annual cost of a continuous review (Q, R ) system with backordering[J ]. Journal of the Operational Research Society, 2002, 53(6):655-663.