Hutchinson, Seth A., and Avinash C. Kak. “Spar: A Planner That Satisfies Operational and Geometric Goals in Uncertain Environments”. AI Magazine 11, no. 1 (March 15, 1990): 30. Accessed April 20, 2024. https://ojs.aaai.org/aimagazine/index.php/aimagazine/article/view/823.