@inbook {619, title = {Introduction to spatial statistics}, booktitle = {Patch Dynamics}, year = {1993}, month = {1993}, pages = {16-26}, publisher = {Springer-Verlag}, organization = {Springer-Verlag}, address = {New York}, author = {Davis, F. W.}, editor = {S. Levin, T. Powell and J. Steele} }