“Estimates of Sizes of Instability Zones for a One-Dimensional Schrödinger Equation With Analytic Quasiperiodic Potential”. Neliniini Kolyvannya 10, no. 2 (June 29, 2007): 188–203. Accessed January 22, 2026. https://twinhead.imath.kiev.ua/index.php/nosc/article/view/430.