TELLA, Y.; SINGH, D.; SINGH, J. SOME ASPECTS OF TOPOLOGICAL SORTING. Covenant Journal of Informatics and Communication Technology, [S. l.], v. 2, n. 1, 2016. Disponível em: https://journals.covenantuniversity.edu.ng/index.php/cjict/article/view/284. Acesso em: 2 may. 2024.