Dekanov, S. Ya. “Statistic $D$-Property of Voronoi Summation Methods of Class $W_{Q^2}$”. Ukrains’kyi Matematychnyi Zhurnal 55, no. 3 (March 25, 2003): 360–372. Accessed December 5, 2025. https://umj.imath.kiev.ua/index.php/umj/article/view/3910.