Bhattacharya, Subhrajit. “Search-Based Path Planning With Homotopy Class Constraints”. Proceedings of the AAAI Conference on Artificial Intelligence 24, no. 1 (July 4, 2010): 1230–1237. Accessed May 31, 2026. https://ojs.aaai.org/index.php/AAAI/article/view/7735.