SCHWARTZBACH, M. I. Static Correctness of Hierarchical Procedures. DAIMI Report Series, [S. l.], v. 18, n. 295, 1989. DOI: 10.7146/dpb.v18i295.6689. Disponível em: https://tidsskrift.dk/daimipb/article/view/6689. Acesso em: 8 may. 2024.