MasmalievG. M. and KhanmamedovA. K. (2010) “On conditions for the discreteness of the spectrum of a semiinfinite Jacobi matrix with zero diagonal”, Ukrains’kyi Matematychnyi Zhurnal, 62(2), pp. 285–288. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/2866 (Accessed: 23November2024).