LenyukM. P., and OleinikN. P. “On a Class of Hybrid Integral Transformations (Bessel-Fourier-Bessel-. -Fourier-Bessel) on the Polar Axis With $2n$ Junction Points”. Ukrains’kyi Matematychnyi Zhurnal 45, no. 8 (August 25, 1993): 1096–1103. Accessed July 27, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/5905.