Sabtu, Nuridah, Adrian J. Saul, and Gavin Sailor. “Hydraulic Interaction of a Gully System”. American Scientific Research Journal for Engineering, Technology, and Sciences 21, no. 1 (July 11, 2016): 202–209. Accessed May 6, 2024. https://asrjetsjournal.org/index.php/American_Scientific_Journal/article/view/1764.