IQBAL, M. . J.; QUAMAR, J. PLANETARY ORBITS IN AxISYMMETRIC VACUUM GRAVITATIONAL FIELDS. Biological Sciences - PJSIR, [S. l.], v. 46, n. 3, p. 148–150, 2003. Disponível em: https://biostaging.pjsir.org/index.php/biological-sciences/article/view/1614. Acesso em: 27 jul. 2025.