ALSTRUP, S.; HUSFELDT, T.; RAUHE, T. Marked Ancestor Problems (Preliminary Version). BRICS Report Series, [S. l.], v. 5, n. 7, 1998. DOI: 10.7146/brics.v5i7.19279. Disponível em: https://tidsskrift.dk/brics/article/view/19279. Acesso em: 29 mar. 2024.