ZORII, N. V. A noncompact variational problem in the theory of riesz potentials. II. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 48, n. 5, p. 603–613, 1996. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/5293. Acesso em: 27 apr. 2025.