Stefano Spaccapietra Christine Parent Christelle Vangenot GIS Databases: From Multiscale to MultiRepresentation. 57-70 2000 conf/sara/2000 SARA http://link.springer.de/link/service/series/0558/bibs/1864/18640057.htm db/conf/sara/sara2000.html#SpaccapietraPV00