1. Estimating efficient spacing for arterials and expressways;Creighton;Highway Research Board Bulletin,1960
2. The optimum bus service: a theoretical model for a large uniform urban area;Holroyd,1965
3. Optimal network geometry;Newell,1974
4. Transport network optimization in the Dutch Integral Transportation Study;Steenbrink;Transpn. Res.,1974
5. Optimization of Transport Networks;Steenbrink,1974