APT, K. R.; PLOTKIN, G. D. A Cook’s Tour of Countable Nondeterminism. DAIMI Report Series, [S. l.], v. 10, n. 133, 1981. DOI: 10.7146/dpb.v10i133.18448. Disponível em: https://tidsskrift.dk/daimipb/article/view/18448. Acesso em: 28 apr. 2024.