H. Hsieh Kim Fung Lam Eng Ung Choo Comparative study of dynamic lot sizing heuristics with backlogging. 393-407 1992 19 Comput. Oper. Res. 5 https://doi.org/10.1016/0305-0548(92)90069-H db/journals/cor/cor19.html#HsiehLC92