YOUNSO, A. E. .; HANOUNEH, I. . Maximum Principle for Solution of Biharmonic Equation in The Ball. Tishreen University Journal -Basic Sciences Series, [S. l.], v. 41, n. 3, 2019. Disponível em: https://journal.tishreen.edu.sy/index.php/bassnc/article/view/8825. Acesso em: 19 apr. 2024.