ABKAR, A.; HEDENMALM, H. A Riesz representation formula for super-biharmonic functions. Annales Fennici Mathematici, [S. l.], v. 26, n. 2, p. 305–324, 2001. Disponível em: https://afm.journal.fi/article/view/135008. Acesso em: 25 nov. 2024.