Clark, P. and F. Evans. (1954) Distance to nearest neighbor as a measure of spatial relationships in populations. Ecology, 35:445–453.
Cressie, N. A. C. (1991) Statistics for Spatial Data. New York: John Wiley & Sons, Inc.
Gilbert, Richard O. (1987)Statistical Methods For Environmental Pollution Monitoring. New York: Van Nostrand Reinhold.
Hildebrand, David K. (1986) Statistical Thinking for Behavioral Scientists. Duxbury Press.
King, Ronald S. and Bryant Julstrom. (1982) Applied Statistics Using the Computer. Sherman Oaks, California: Alfred Publishing Company.
Press, William H. et al. (1992) Numerical Recipes in C: The Art of Scientific Computing. New York: Cambridge University Press.
Montgomery, D. C. and G. C. Runger. (1994) Applied Statistics and Probability for Engineers. New York: John Wiley & Sons, Inc.
Ryan, T. (1997) Modern Regression Methods. New York: John Wiley Sons, Inc.
Sheskin, D.J. (2000) Handbook of Parametric and Nonparametric Statistical Procedures, Second Edition. Boca Raton, Florida: Chapman & Hall/CRC.
Skellam, J. (1952) Studies in Statistical Ecology. I: Spatial Pattern., 39:346–362.
Sokal, Robert R. and F. James Rohlf. (1981) Biometry: Principles and Practices of Statistics in Biological Research. New York: Freeman and Co.
Zar, Jerrold H. (1974) Biostatistical Analysis. Englewood Cliffs, New Jersey: Prentice Hall.