STONE, N. D.; ENGEL, B. A. Knowledge-Based Systems in Agriculture and Natural Resource Management. AI Magazine, [S. l.], v. 11, n. 3, p. 20, 1990. DOI: 10.1609/aimag.v11i3.847. Disponível em: https://ojs.aaai.org/index.php/aimagazine/article/view/847. Acesso em: 20 may. 2022.