1. The traffic assignment problem for a general network;Dafermos;J. Res. nat. Bur. Stand.,1969
2. Applied Regression Analysis;Draper,1967
3. Some properties of trip distribution methods;Evans;Transpn Res.,1970
4. The calibration of trip distribution models;Hyman;Environment and Planning,1969
5. Elimination of linear parameters in non-liniar regression;Lawton;Technometrics,1971