Kimberly van Niel Shawn W. Laffan Kimberly van Niel, Shawn W. LaffanGambling with randomness: the use of pseudo-random number generators in GIS. 49-68 2003 17 International Journal of Geographical Information Science 1 http://taylorandfrancis.metapress.com/openurl.asp?genre=article&issn=1365-8816&volume=17&issue=1&spage=49 db/journals/gis/gis17.html#NielL03