[1]
V. M. Molyboga and V. A. Mikhailets, “One-dimensional Schrödinger operators with singular periodic potentials”, MFAT, vol. 14, no. 2, pp. 184–200, Jun. 2008, Accessed: Dec. 17, 2025. [Online]. Available: https://zen.imath.kiev.ua/index.php/mfat/article/view/382