GRYSHCHUK, S. Biharmonic continuations of gradients with the help of monogenic functions with values in the biharmonic algebra. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 76, n. 4, p. 487–501, 2024. DOI: 10.3842/umzh.v74i4.7867. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/7867. Acesso em: 27 apr. 2025.