Waryoba, D. C.R., and B. A. Majaja. “DESIGN OF A LOW-COST SOLAR POWERED RINGBOM STIRLING ENGINE”. Tanzania Journal of Engineering and Technology 19, no. 1 (August 10, 2018). Accessed April 7, 2026. http://196.44.161.124/index.php/tjet/article/view/1953.