1. The mathematical form of travel time factors;Ashford;Highway Res. Rec.,1969
2. The calibration of gravity, entropy and related models of spatial interaction;Batty;Environment & Plann.,1972
3. Studies in traffic generetics;Bexelius,1969
4. The calibration of trip distribution models with exponential or similar cost functions;Evans;Transpn Res.,1971
5. The calibration of trip distribution models;Hyman;Environment and Plann.,1969