1. Alexander, F., R.A. Cartwright & P.M. McKinney (1988). A comparison of recent statistical techniques of testing for spatial clustering: preliminary results. In: P. Elliot, ed. Methodology of Enquiries into Disease Clustering. London, Small Area Health Statistics Unit, London School of Hygiene and Tropical Medicine, London
2. Anselin, L. & A. Getis (1991). Spatial statistical analysis and geographical information systems. Paper presented at the 31st European Congress of the Regional Science Association, Lisbon, Portugal.
3. Bailey, T.C. (1992). Statistical spatial analysis & geographical information systems: a review of the potential & progress in the state of the art. In: Proceedings of the EGIS’92 Conference. Utrecht, EGIS Foundation.
4. Working paper;P.J.B. Brown,1990
5. Clayton, D. & J. Kaldor (1987). Empirical Bayes estimates of age-standardised relative risks for use in disease-mapping. Biometrics, 43: 671–681.