Berhanua, H., F. Bogalea, A. Abebe, and M. Manaye. “An Economic Feasibility Study of Solar and Diesel Water Pumping Systems for Irrigation in Ethiopia: A Case Study of Kombolcha, Wollo”. Abyssinia Journal of Engineering and Computing, vol. 2, no. 2, July 2022, pp. 28-41, doi:10.20372/ajec.2022.v2.i2.776.