MOLDESTAD, J.; STOLTENBERG-HANSEN, V. Finite alogorithmic procedures and inductive definability. Mathematica Scandinavica, Berkeley, CA, United States, v. 46, p. 62–76, 1980. DOI: 10.7146/math.scand.a-11852. Disponível em: https://journals.msp.org/mscand/article/view/1795. Acesso em: 25 jul. 2026.