GENČEV, Marian. Infinite product for e^{6ζ(3)}. Annales Mathematicae Silesianae, [S. l.], v. 21, p. 41–48, 2007. Disponível em: https://trrest.vot.pl/ojsus/index.php/AMSIL/article/view/14061. Acesso em: 7 may. 2025.