SHALACK, V. On relational and functional languages. Logic and Logical Philosophy, [S. l.], v. 21, n. 1, p. 25–32, 2012. DOI: 10.12775/LLP.2012.002. Disponível em: https://apcz.umk.pl/LLP/article/view/LLP.2012.002. Acesso em: 27 apr. 2024.