Shanthikumar, J. George, and David D. Yao. Strong Stochastic Convexity: Closure Properties and Applications. Journal of Applied Probability, 1991, 28 (1): 131-145.

Chen, Hong,and A. Mandelbaum. Discrete Flow Networks: Bottleneck Analysis and Fluid Approximations. Mathematics of Operations Research, 1991, 16 (2): 408-446.

Chen, Hong, and A. Mandelbaum. Stochastic Discrete Flow Networks: Diffusion Approximations and Bottlenecks. Annals of Probability, 1991, 19 (4): 1463-1519.

Chen, Hong, and D.D. Yao. Derivatives of the Expected Delay in the GI/G/1 Queue. Journal of Applied Probability, 1990, 27 (4): 899-907.

Yao, D.D., and J.G. Shanthikumar. Optimal scheduling control of a flexible machine. Ieee Transactions on Robotics, 1990, 6 (6): 706-712.

Ross, K.W., and D.D. Yao. Monotonicity properties for the stochastic knapsack. IEEE Transactions on Information Theory, 1990, 36 (5): 1173-1179.

Chen, Hong, and David D. Yao. Optimal intensity control of a queueing system with state-dependent capacity limit. Ieee Transactions on Automatic Control, 1990, 35 (4): 459-464.

Yao, David D., and Frances F. Pei. Flexible Parts Routing in Manufacturing Systems. Iie Transactions, 1990, 22 (1): 48-55.

J.M. Harrison, R.J. Williams, and Hong Chen. Brownian Models of Closed Queueing Networks with Homogeneous Customer Populations. Stochastics and Stochastics Reports, 1990, 29 (1): 37-74.

Chao, Xiuli, and Michael Pinedo. On Two Servers in Tandem with No Intermediate Buffer and Batches Arriving According to a Poisson Process. Stochastic Models, 1990, 6 (4): 735-748.