MAYOH, B. H. Program Models: Meaning and Proof. DAIMI Report Series, [S. l.], v. 12, n. 157, 1983. DOI: 10.7146/dpb.v12i157.7431. Disponível em: https://tidsskrift.dk/daimipb/article/view/7431. Acesso em: 8 may. 2024.