Tan, Qing, Qing He, and Zhongzhi Shi. “Nonparametric Curve Extraction Based on Ant Colony System”. Proceedings of the AAAI Conference on Artificial Intelligence 24, no. 1 (July 3, 2010): 599-604. Accessed October 23, 2021. https://ojs.aaai.org/index.php/AAAI/article/view/7665.