“Estimates of sizes of instability zones for a one-dimensional Schrödinger equation with analytic quasiperiodic potential”, НК, vol. 10, no. 2, pp. 188–203, Jun. 2007, Accessed: Jan. 22, 2026. [Online]. Available: https://twinhead.imath.kiev.ua/index.php/nosc/article/view/430