Sidauruk, Paston, Rasi Prasetio, . Satrio, and Evarista R. Pujiindiyati. “Origin and Recharge Area Determination of Springs Around a Lake for Sustainability of the Lake”. Journal of Human, Earth, and Future 6, no. 1 (March 1, 2025): 27–40. Accessed May 30, 2025. http://hefjournal.org/index.php/HEF/article/view/503.