V. A. Zolotarev and V. N. Levchuk, “On a function system making a basis in a weight space”, MFAT, vol. 23, no. 3, pp. 261–269, Sep. 2017, Accessed: Feb. 04, 2026. [Online]. Available: https://zen.imath.kiev.ua/index.php/mfat/article/view/669