A. A. Kalyuzhnyi, G. B. Podkolzin, and Y. A. Chapovsky, “Harmonic analysis on a locally compact hypergroup”, MFAT, vol. 16, no. 4, pp. 304–332, Dec. 2010, Accessed: Feb. 04, 2026. [Online]. Available: https://zen.imath.kiev.ua/index.php/mfat/article/view/460