@article {DBLP:journals/gis/MancarellaRRT04, title = {Integrating knowledge representation and reasoning in Geographical Information Systems}, journal = {International Journal of Geographical Information Science}, volume = {18}, number = {4}, year = {2004}, pages = {417-447}, author = {Paolo Mancarella and Alessandra Raffaet{\`a} and Chiara Renso and Franco Turini} }