GRYSHCHUK , S. V. Monogenic functions with values in сommutative сomplex algebras of the second rank with unit and generalized biharmonic equation with simple nonzero simple characteristics. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 73, n. 4, p. 474–487, 2021. DOI: 10.37863/umzh.v73i4.6199. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/6199. Acesso em: 5 dec. 2025.