VolchkovV. V., VolchkovV. V., and Savost’yanovaI. M. “One Problem Connected With the Helgason Support Problem”. Ukrains’kyi Matematychnyi Zhurnal 67, no. 9 (September 25, 2015): 1189-1200. Accessed September 27, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/2058.