@article{CSIS_2013_10_3_a7,
     author = {Anna Formica and Elaheh Pourabbas and Maurizio Rafanelli},
     title = {Constraint {Relaxation} of the {Polygon-Polyline} {Topological} {Relation} for {Geographic} {Pictorial} {Query} {Languages}},
     journal = {Computer Science and Information Systems},
     publisher = {mathdoc},
     volume = {10},
     number = {3},
     year = {2013},
     url = {http://geodesic.mathdoc.fr/item/CSIS_2013_10_3_a7/}
}