ERIKAT, I.; ARAR, M. Ricci Tensor in General Ellipsoidal Geometry. Jordan Journal of Physics , [S. l.], v. 19, n. 2, p. 123–129, 2026. Disponível em: https://jjp.yu.edu.jo/index.php/jjp/article/view/256. Acesso em: 14 jul. 2026.