FRESSE, Lucas; MOTREANU, Viorica V. Generalized versus classical normal derivative. Studia Universitatis Babeș-Bolyai Mathematica, [S. l.], v. 68, n. 1, p. 29–42, 2023. DOI: 10.24193/subbmath.2023.1.02. Disponível em: https://studia.reviste.ubbcluj.ro/index.php/subbmathematica/article/view/4920. Acesso em: 19 apr. 2025.