Approximate algorithms for the travelling purchaser problem. - Hoon Liong Ong (Oper. Res. Lett., 1982)

Probabilistic Analysis of Bin Packing Heuristics. - Hoon Liong Ong; Michael J. Magazine; T. S. Wee (Oper. Res., 1984)

Solving the biobjective zero-one knapsack problem by an efficient LP-based heuristic. - Cai Wen Zhang; Hoon Liong Ong (Eur. J. Oper. Res., 2004)

An efficient solution to biobjective generalized assignment problem. - Cai Wen Zhang; Hoon Liong Ong (Adv. Eng. Softw., 2007)