PHYSICAL REVIEW D, cilt.102, sa.6, 2020 (SCI-Expanded)
We review the derivations made in Filho and Bezerra [Phys. Rev. D 64, 084009 (2001)], Barbosa and Bezerra [Gen. Relativ. Gravit. 48, 149 (2016)], and Graca and Bezerra [Mod. Phys. Lett. A 27, 1250178 (2012)] and show that the resulting line elements in Boyer-Lindquist coordinates are not valid.