HÖLLER, Daniel; BEHNKE, Gregor; BERCHER, Pascal; BIUNDO, Susanne; FIORINO, Humbert; PELLIER, Damien; ALFORD, Ron. HDDL: An Extension to PDDL for Expressing Hierarchical Planning Problems. Proceedings of the AAAI Conference on Artificial Intelligence, [S. l.], v. 34, n. 06, p. 9883–9891, 2020. DOI: 10.1609/aaai.v34i06.6542. Disponível em: https://ojs.aaai.org/index.php/AAAI/article/view/6542. Acesso em: 26 may. 2026.