Glasserman, Paul, and David D. Yao. Generalized Semi-Markov Processes: Antimatroid Structure and Second Order Properties. Mathematics of Operations Research, 1992, 17 (2): 444-469.

Glasserman, Paul, and David D. Yao. Monotonicity in Generalized Semi-Markov Processes. Mathematics of Operations Research, 1992, 17 (1): 1-21.

Shanthikumar, J. George, and David D. Yao. Spatiotemporal Convexity of Stochastic Processes and Applications. Probability in the Engineering and Informational Sciences, 1992, 6 (1): 1-16.

Song, Jing-Sheng, and Paul H. Zipkin. Evaluation of Base-stock Policies in Multiechelon Inventory Systems with State-dependent Demands: Part I: State-independent Policies. Naval Research Logistics, 1992, 39 (5): 715-728.

Chang, C.-S, Xiuli Chao, M. Pinedo, and J. G. Shanthikumar. Stochastic convexity for multidimensional processes and its applications. Ieee Transactions on Automatic Control, 1991, 36 (12): 1347-1355.

Shanthikumar, J. George, and David D. Yao. Bivariate characterization of some stochastic order relations. Advances in Applied Probability, 1991, 23 (3): 642-659.

Ross, K.W., and D.D. Yao. Optimal load balancing and scheduling in a distributed computer system. Journal of the Acm, 1991, 38 (3): 676-689.

Glasserman, Paul, and David D. Yao. Algebraic structure of some stochastic discrete event systems, with applications. Discrete Event Dynamic Systems-Theory and Applications, 1991, 1 (1): 7-35.

Chang, Cheng-Shang, Xiuli Chao, and Michael Pinedo. Monotonicity results for queues with doubly stochastic Poisson arrivals: Ross's conjecture. Advances in Applied Probability, 1991, 23 (1): 210-228.

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