ZinchenkoT. N., and MurachA. A. “Douglis-Nirenberg Elliptic Systems in Hörmander Spaces”. Ukrains’kyi Matematychnyi Zhurnal 64, no. 11 (November 25, 2012): 1477-1476. Accessed November 24, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/2674.