1. Decomposition of nets;Barkley;Chem. Eng. J.,1972
2. Dynamic Programming;Bellman,1957
3. Cheng, W.B (1976). Computational Techniques for Simple Pipeline Network Design. M.S. thesis in Chemical Engineering, Northwestern University, Evanston, Illinois.
4. Interactive synthesis of cascade refrigeration systems;Cheng;I & EC Proc. Des. Dev.,1980
5. The bordered triangular matrix and minimum essential sets of a digraph;Cheung;IEEE Trans. Circ. Sys.,1974