Sagala, Albert, Pandapotan Siagian, Indra Tambunan, and Tennov Simanjuntak. “Implementation of Portable Off-Grid Solar Water Pump for Irrigation Systems”. Jurnal Mantik 5, no. 4 (February 18, 2022): 2542-2548. Accessed May 2, 2026. https://www.iocscience.org/ejournal/index.php/mantik/article/view/1811.