Dȩbowska K., and I. Nizhnik. “Spectral Analysis of Self-Adjoint Momentum Operators With Nonlocal Potentials”. Ukrains’kyi Matematychnyi Zhurnal 77, no. 12 (November 14, 2025): 715–742. Accessed December 5, 2025. https://umj.imath.kiev.ua/index.php/umj/article/view/9415.