ALSTRUP, Stephen; HUSFELDT, Thore; RAUHE, Theis. Marked Ancestor Problems. BRICS Report Series, [S. l.], v. 5, n. 16, 1998. DOI: 10.7146/brics.v5i16.21956. Disponível em: https://tidsskrift.dk/brics/article/view/21956. Acesso em: 5 dec. 2025.