SKOLEM, Th. Remarks on the Connection Between Intuitionistic Logic and a Certain Class of Lattices. Mathematica Scandinavica, Berkeley, CA, United States, v. 6, p. 231–236, 1958. DOI: 10.7146/math.scand.a-10548. Disponível em: https://journals.msp.org/mscand/article/view/2794. Acesso em: 25 jul. 2026.