@conference {DBLP:conf/gis/RaffaetaTR02,
	title = {Enhancing GISs for spatio-temporal reasoning},
	booktitle = {ACM-GIS},
	year = {2002},
	pages = {42-48},
	author = {Alessandra Raffaet{\`a} and Franco Turini and Chiara Renso}
}
