AIKEN, Alexander; KOZEN, Dexter; WIMMERS, Ed. Decidability of Systems of Set Constraints with Negative Constraints. BRICS Report Series, [S. l.], v. 1, n. 32, 1994. DOI: 10.7146/brics.v1i32.21611. Disponível em: https://tidsskrift.dk/brics/article/view/21611. Acesso em: 5 dec. 2025.