KHURI, Suheil. On the properties of a class of polyharmonic functions. Mathematical Modelling and Analysis, [S. l.], v. 18, n. 2, p. 219–235, 2013. DOI: 10.3846/13926292.2013.781069. Disponível em: https://journals.vilniustech.lt/index.php/MMA/article/view/4109. Acesso em: 9 may. 2025.