DurnaN. (2018) “Subdivision of spectra for some lower triangular double-band matrices as operators on $c_0$”, Ukrains’kyi Matematychnyi Zhurnal, 70(7), pp. 913-922. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/1605 (Accessed: 21November2024).