[1]
H. D. Voulov, M. J. Bohner, and M. B. Bekker, “A q-difference operator with discrete and simple spectrum”, MFAT, vol. 17, no. 4, pp. 281–294, Dec. 2011, Accessed: Dec. 16, 2025. [Online]. Available: https://zen.imath.kiev.ua/index.php/mfat/article/view/493