HAUG, E. G.; GIANFRANCO, S. The Planck Mass Density Radius of the Universe. European Journal of Applied Physics, [S. l.], v. 4, n. 2, p. 40–47, 2022. DOI: 10.24018/ejphysics.2022.4.2.165. Disponível em: https://ej-physics.org/index.php/ejphysics/article/view/165. Acesso em: 25 jan. 2025.