1. Cliff, A. D. and Ord, J. K. (1981): Spatial process: Models & application. Pion, London, 266 p.
2. Foot, D. (1981): Operational Urban Models. Methuen, London, 231 p.
3. Krishna Iyer, P. V. (1949): The first and second moments of some probability distributions aris-ing from points on a lattice and their applica-tion. Biometrika, 36, 135 141.
4. Roach, S. A. (1968): The Theory of Random Clumping. Methuen, London, 94 p.
5. Wilson, A. G. (1974): Urban & Regional Models in Geography & Planning. John Wiley: & Sons, London, 418 p.