Ahmad Zaenal Arifin, and Subchan. “avigasi an endali ada esawat dara ir wak (Puna) ntuk enghindari alangan”. Limits: Journal of Mathematics and Its Applications 14, no. 1 (May 15, 2017): 73–87. ccessed December 6, 2025. https://journal.its.ac.id/index.php/limits/article/view/5220.