Tight bounds for periodicity theorems on the unbounded Knapsack problem. - Ping Heidi Huang; Mark A. Lawley; Thomas L. Morin (Eur. J. Oper. Res., 2011)

A constructive periodicity bound for the unbounded knapsack problem. - Ping Heidi Huang; Kwei Tang (Oper. Res. Lett., 2012)

A non-linear non-weight method for multi-criteria decision making. - Ping Heidi Huang; Tzuong-Tsieng Moh (Ann. Oper. Res., 2017)