Gubreev GM, Dolgopolova MV, Nedobachiy SI. A spectral decomposition in one class of non-selfadjoint operators. MFAT [Internet]. 2010 Jun. 25 [cited 2025 Dec. 16];16(2):140-57. Available from: https://zen.imath.kiev.ua/index.php/mfat/article/view/447