DANTCHEV, S.; RIIS, S. A Tough Nut for Tree Resolution. BRICS Report Series, [S. l.], v. 7, n. 10, 2000. DOI: 10.7146/brics.v7i10.20137. Disponível em: https://tidsskrift.dk/brics/article/view/20137. Acesso em: 27 apr. 2024.