KRISHNAMURTHY, M. V.; SMITH, F. J. An Object Oriented Knowledge based System for Basic Problem solving in Science and Engineering . Defence Science Journal, [S. l.], v. 43, n. 2, p. 111–119, 2013. DOI: 10.14429/dsj.43.4320. Disponível em: https://publications.drdo.gov.in/ojs/index.php/dsj/article/view/4320. Acesso em: 16 jun. 2025.