Lotake, Swapnil N., and M. M. Wagh. “Performance Evaluation of Multiple Helical Tubes As a Receiver for Solar Parabolic Trough Collector”. Asia Pacific Journal of Energy and Environment 7, no. 1 (April 24, 2020): 39–46. Accessed May 4, 2024. https://i-proclaim.my/journals/index.php/apjee/article/view/272.