GIRI, S. R.; LAKHEMARU, P.; SHRESTHA, A.; LAMA, S.; SAPKOTA, S. Design, Fabrication and Testing of Gravity-Powered Light. Journal of the Institute of Engineering, [S. l.], v. 15, n. 1, p. 170–176, 2020. DOI: 10.3126/jie.v15i1.27726. Disponível em: https://www.nepjol.info/index.php/JIE/article/view/27726. Acesso em: 4 may. 2024.