Bondarenko, A. V. “On a Spherical Code in the Space of Spherical Harmonics”. Ukrains’kyi Matematychnyi Zhurnal 62, no. 6 (June 25, 2010): 857 – 859. Accessed December 5, 2025. https://umj.imath.kiev.ua/index.php/umj/article/view/2917.