STOLT, B. Über den kleinsten positiven quadratischen Nichtrest. MATHEMATICA SCANDINAVICA, [S. l.], v. 2, p. 187–191, 1954. DOI: 10.7146/math.scand.a-10405. Disponível em: https://www.mscand.dk/article/view/10405. Acesso em: 14 apr. 2025.