R. Colistete Jr., J. Gariel, G. Marcilhacy, N. O. Santos, Parametrization of singularities of the Demianski-Newman spacetimes, Blucher Physics Proceedings, Volume 4, 2017, Pages 158-164, ISSN 23582359, http://dx.doi.org/10.5151/phypro-viii-efa-35 (www.proceedings.blucher.com.br/article-details/parametrization-of-singularities-of-the-demianski-newman-spacetimes-27760) Palavras-chave:: ;