TORASSO, F. Simultaneous primality of the integers n and 2n − d. Annales Universitatis Paedagogicae Cracoviensis Studia Mathematica, [S. l.], v. 12, p. 83–90, 2013. Disponível em: https://studmath.uken.krakow.pl/article/view/13186. Acesso em: 31 oct. 2026.