VÄÄNÄNEN, K. On the approximation of certain infinite products. MATHEMATICA SCANDINAVICA, [S. l.], v. 73, p. 197–208, 1993. DOI: 10.7146/math.scand.a-12465. Disponível em: https://www.mscand.dk/article/view/12465. Acesso em: 28 apr. 2024.