Aldashev, S. A. (2012). Well-posedness of the Dirichlet and Poincare problems for a multidimensional Gellerstedt equation in a cylindric domain. Ukrains’kyi Matematychnyi Zhurnal, 64(3), 426-432. Retrieved from https://umj.imath.kiev.ua/index.php/umj/article/view/2587