QOCAYEVA , Nubar; HƏSƏNOV , Mətin. Derivatives and Differentials of Multivariable Functions: A Theoretical and Applied Analysis . Luminis Applied Science and Engineering, [S. l.], v. 3, n. 2, p. 13–21, 2026. DOI: 10.69760/lumin.2026002002. Disponível em: https://egarp.lt/index.php/LUMIN/article/view/568.. Acesso em: 30 apr. 2026.