Waka Cheung and Yew-Kwang Ng Specialization and Cooperation in Research Asia-Pacific Journal of Accounting & Economics 14 (2007) 27–42
Waka Cheung and Yew-Kwang Ng Duality in an industry with fluctuating demand Annals of Economics and Finance 8-2, 229{250 (2007)
Waka Cheung and Yew-Kwang Ng The Impact of Market Scale on Standardization and Specialization Studies in Microeconomics 1(2) (2013) 243–266
Waka Cheung and Fang Chen A Three-Stage Stochastic Dynamic Pricing Game Model Affected by New Products into the Market Open Journal of Statistics, 2015, 5, 284-290