1. Aitkin, M., Anderson, D., Francis, B. and Hinde, J. (1989): Statistical modelling in GLIM. Oxford Univ. Press, Oxford, 374p.
2. Anas, A.(1983): Discrete choice theory, information and multinomial logit and gravity models. Transpn. Res., 17B, 13-23.
3. Batty, M. and Mackie, S. (1972): The calibration of gravity, entropy, and related models of spatial interaction. Environ, and Plann., 4, 205-233.
4. Baxter, M.(1982): Similarities in methods of estimating spatial interaction models. Geogr. Anal., 14. 267-272.
5. Baxter, M. and Ewing, G. O. (1986): A framework for the exploratory development of spatial interaction models: a recreation travel example. Journal of Leisure Research, 18, 320-336.