Pseudolinearity and efficiency. - Kim-Lin Chew; Eng Ung Choo (Math. Program., 1984)

An Optimization Based Approach to the Train Operator Scheduling Problem at Singapore MRT. - Kim-Lin Chew; Johnny Pang; Qizhang Liu; Jihong Ou; Chung-Piaw Teo (Ann. Oper. Res., 2001)