Lujara, N. K., and P. N. Materu. “A DIRECT COUPLED PHOTOVOLTAIC WATER PUMPING SYSYTEM WITH IMPROVED PERFORMANCE”. Tanzania Journal of Engineering and Technology 21, no. 3 (August 14, 2018). Accessed April 7, 2026. http://196.44.161.124/index.php/tjet/article/view/2080.