RAVICHANDRA RAO, I. K. Computerisation of POPSl. Journal of Information and Knowledge, [S. l.], v. 13, n. 3&4, p. 85–91, 1976. DOI: 10.17821/srels/1976/v13i3&4/50463. Disponível em: https://srels.org/index.php/sjim/article/view/50463. Acesso em: 28 jul. 2025.