Diggle, P. J. (2003). Statistical Analysis of Spatial Point Patterns, Oxford University Press Inc.

   Rowlingson, B., Diggle, P., adapted, packaged for R by Roger Bivand, pcp functions by Giovanni Petris & goodness of fit by Stephen Eglen (2006). splancs: Spatial and Space-Time Point Pattern Analysis. R package version 2.01-17.
http://www.maths.lancs.ac.uk/ rowlings/Splancs/