Formula covering black holes and the industrial sample negative germ. International Journal of Scientific Research and Management (IJSRM), [S. l.], v. 11, n. 09, p. 137–139, 2023. DOI: 10.18535/ijsrm/v11i09.aa03. Disponível em: https://ijsrm.net/index.php/ijsrm/article/view/4688.. Acesso em: 20 may. 2024.