1. Anderberg M.R. 1973. Cluster analysis for applications. Academic Press. New York Anselin L. 1995. Local indicators of spatial association–LISA. Geographical Analysis, 27: 93–115.
2. Barkley D.L., Henry M.S.. Bao S. and Brooks K.R. 1995. How functional are economic areas? Tests for intra-regional spatial association using spatial data analysis. Papers in Regional Science
74: 297–316.
3. Bithell J.F. 1990. An application of density estimation to geographical epidemiology. Statistics in Medicine
9: 691–701.
4. Clayton D. and Kaldor J. 1987. Empirical Bayes estimates of age-standardized relative risks for use in disease mapping. Biometrics
43: 671–681.
5. Cliff, Haggett, Ord, Bassett and Davies. 1975. Elements of spatial structure. Cambridge University Press.