Syarifudin, Erick, Muhammad Chaerul, and Sri Gusty. “Determination of Flow Direction and Catchment Area Model Using Quantum GIS Analysis and Remote Sensing Imagery at Nickel Mining Locations”. ASTONJADRO 14, no. 3 (September 24, 2025): 956–964. Accessed December 5, 2025. https://ejournal.uika-bogor.ac.id/index.php/ASTONJADRO/article/view/18805.