Martin C. Cooper Linear-Time Algorithms for Testing the Realisability of Line Drawings of Curved Objects. [Citation Graph (0, 0)][DBLP] Artif. Intell., 1999, v:108, n:1-2, pp:31-67 [Journal]
Jochen Renz, Bernhard Nebel On the Complexity of Qualitative Spatial Reasoning: A Maximal Tractable Fragment of the Region Connection Calculus. [Citation Graph (0, 0)][DBLP] Artif. Intell., 1999, v:108, n:1-2, pp:69-123 [Journal]
Charles L. Ortiz Jr. Explanatory Update Theory: Applications of Counterfactual Reasoning to Causation. [Citation Graph (0, 0)][DBLP] Artif. Intell., 1999, v:108, n:1-2, pp:125-178 [Journal]