BORSUK , M. V. Behaviour of solutions of the Dirichlet problem for quasilinear elliptical equations of the second order of a general kind near angular point. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 44, n. 2, p. 167–173, 1992. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/7828. Acesso em: 7 apr. 2025.