Giri SR, Lakhemaru P, Shrestha A, Lama S, Sapkota S. Design, Fabrication and Testing of Gravity-Powered Light. J. Inst. Engineering [Internet]. 2020 Feb. 16 [cited 2024 Nov. 21];15(1):170-6. Available from: https://nepjol.info/index.php/JIE/article/view/27726