The Ergo Region of the Kerr Black Hole in the Isotropic Coordinate. European Journal of Applied Physics, [S. l.], v. 6, n. 2, p. 26–30, 2024. DOI: 10.24018/ejphysics.2024.6.2.306. Disponível em: https://ej-physics.org/index.php/ejphysics/article/view/306. Acesso em: 10 sept. 2025.