QUEVEDO, H.; TOKTARBAY, S.; AIMURATOV, Y. Quadrupolar gravitational fields described by the q-metric. International Journal of Mathematics and Physics, [S. l.], v. 3, n. 2, p. 133–139, 2012. Disponível em: https://ijmph.kaznu.kz/index.php/kaznu/article/view/56. Acesso em: 4 may. 2024.