AnopA. V., KasirenkoT. M., and MurachA. A. “Irregular Elliptic Boundary-Value Problems and Hörmander Spaces”. Ukrains’kyi Matematychnyi Zhurnal 70, no. 3 (March 25, 2018): 299-317. Accessed November 21, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/1558.