B. Zoppis, G. Calvary, und J. Crowley. Geometric Reasoning for Perception and Action, Volume 708 von Lecture Notes in Computer Science, Seite 183-199. Springer, (1991)
M. Crowley, und D. Poole. Twenty-Fifth AAAI Conference on Artificial Intelligence (AAAI-11), special track on Computational Sustainability and AI, San Francisco, (2011)