SWARTOUT, W. R. DARPA Santa Cruz Workshop on Planning. AI Magazine, [S. l.], v. 9, n. 2, p. 115, 1988. DOI: 10.1609/aimag.v9i2.680. Disponível em: https://ojs.aaai.org/index.php/aimagazine/article/view/680. Acesso em: 23 nov. 2020.