CALVANESE, Diego; DE GIACOMO, Giuseppe; LENZERINI, Maurizio; VARDI, Moshe. Node Selection Query Languages for Trees. Proceedings of the AAAI Conference on Artificial Intelligence, [S. l.], v. 24, n. 1, p. 279–284, 2010. DOI: 10.1609/aaai.v24i1.7598. Disponível em: https://ojs.aaai.org/index.php/AAAI/article/view/7598. Acesso em: 21 may. 2026.