WACH-MICHALIK, A. On a problem of H.-H. Kairies concerning Euler’s Gamma function. Annales Universitatis Paedagogicae Cracoviensis Studia Mathematica, [S. l.], v. 1, p. 151–161, 2001. Disponível em: https://studmath.uken.krakow.pl/article/view/13526. Acesso em: 30 oct. 2026.