Raquel Viaña Paola Magillo Enrico Puppo Pedro A. Ramos <i>Multi-VMap</i>: A Multi-Scale Model for Vector Maps. 359-394 2006 10 GeoInformatica 3 http://dx.doi.org/10.1007/s10707-006-9832-y db/journals/geoinformatica/geoinformatica10.html#VianaMPR06