@inbook {ART96, title = {Towards {D}eclarative {GIS} {A}nalysis}, year = {1996}, note = {{\em Proocedings of the {F}ourth {ACM} {W}orkshop on {A}dvances in {G}eographic {I}nformation {S}ystems}, pages.}, pages = {99{\textendash}105}, author = {Domenico Aquilino and Chiara Renso and Franco Turini} }