LARIN, D. V.; SKRYPNIK, I. V. Principle of additivity in averaging of degenerate nonlinear Dirichlet problems. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 50, n. 1, p. 118–135, 1998. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/4977. Acesso em: 5 dec. 2025.