MORENO SOCIAS, Guillermo. Length of Polynomial Ascending Chains and Primitive Recursiveness. MATHEMATICA SCANDINAVICA, [S. l.], v. 71, p. 181–205, 1992. DOI: 10.7146/math.scand.a-12421. Disponível em: https://tidsskrift.dk/math/article/view/12421. Acesso em: 13 aug. 2026.