1. Evaluation of Rail Rapid Transit and Express Bus Service in Urban Commuter Market;Boyd,1973
2. Cost minimizing positions, lengths and headways for parallel public transit lines having different speeds;Byrne;Transpn. Res.,1976
3. Analytic Optimization of Bus Systems in Heterogeneous Environments;Chang,1990
4. Optimization models for comparing conventional and subscription bus feeder services;Chang;Transpn. Sci.,1989
5. Analytic Models of Feeder Bus Systems with Time Dependent and Elastic Demand;Chang,1989