There are a few good papers that describe the statistics behind the kernel methods (for home range analysis) in a way that is fairly accessable to non-mathematicians (like me). You may find them useful if you have not seen them yet (in order of usefulness):
Worton, B.J. 1989. Kernel methods for estimating the utlization distribution in home range studies. Ecology 70(1), 164-168.
Seaman, D.E. and Powell, R.A. 1996. An evaluation of the accuracy of the kernel density estimators for home range analysis. Ecology 77(7), 2075-2085.
Seaman, D.E. et al. 1999. Effects of sample size on kernel home range estimates. Journal of Wildlife Management 63(2), 739-747