POUDEL, P. R. The Black Hole. Himalayan Physics, [S. l.], v. 3, p. 50–55, 2012. DOI: 10.3126/hj.v3i0.7277. Disponível em: https://www.nepjol.info/index.php/HP/article/view/7277. Acesso em: 4 mar. 2024.