1. Public transportation line positions and headway for minimum system and user cost;Byrne,1971
2. Public transportation line positions and headways for minimum cost;Byrne,1972
3. Estimating efficient spacing for arterials and expressways;Creighton;Bulletin 253, Highway Research Board,1960
4. City and Suburban Travel,1967
5. Optimum bus service: A theoretical model for a large uniform urban area;Holroyd,1967