Marie-Christine Fauvet S. Chardonnel Marlon Dumas Pierre-Claude Scholl P. Dumolard Applying Temporal Databases to Geographical Data Analysis. 475-480 1999 DEXA Workshop http://computer.org/conferen/proceed/dexa/0281/02810475abs.htm db/conf/dexaw/dexaw99.html#FauvetCDSD99