MADSEN, O. L.; KRISTENSEN, B. B. On Extended Context Free Grammars and LR-Parsing. DAIMI Report Series, [S. l.], v. 4, n. 53, 1975. DOI: 10.7146/dpb.v4i53.6472. Disponível em: https://tidsskrift.dk/daimipb/article/view/6472. Acesso em: 9 may. 2024.