An Occlusion Calculus Based on an Interval Algebra. - Paulo E. Santos; Gerard Ligozat; Marjan Safi-Samghabadi (BRACIS, 2015)

Consistency Check in a Multiple Viewpoint System for Reasoning About Occlusion. - Ana Paula Martin; Paulo E. Santos; Marjan Safi-Samghabadi (IEA/AIE (1), 2017)