Optimal Pacing of Trains in Freight Railroads: Model Formulation and Solution. - David R. Kraay; Patrick T. Harker; Bintong Chen (Oper. Res., 1991)

Case-based reasoning for repetitive combinatorial optimization problems, part I: Framework. - David R. Kraay; Patrick T. Harker (J. Heuristics, 1996)

Case-Based Reasoning for Repetitive Combinatorial Optimization Problems, Part II: Numerical Results. - David R. Kraay; Patrick T. Harker (J. Heuristics, 1997)