SukhorolskyiM. A. “Boundary-Value Problems for the Helmholts Equation in Domains of the Complex Plane”. Ukrains’kyi Matematychnyi Zhurnal 68, no. 3 (March 25, 2016): 363-376. Accessed November 23, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/1844.