AHMED ABD, A. Exploring the Wonders of the Viessman-Gray Manifold. CENTRAL ASIAN JOURNAL OF MATHEMATICAL THEORY AND COMPUTER SCIENCES, [S. l.], v. 5, n. 3, p. 64–70, 2024. Disponível em: https://cajmtcs.casjournal.org/index.php/CAJMTCS/article/view/620. Acesso em: 28 apr. 2026.