S. A. Telyakovskii, “On the properties of blocks of terms of the series $\sum \cfrac1k \sin kx$”, Ukr. Mat. Zhurn., vol. 64, no. 5, pp. 713–718, May 2012, Accessed: Dec. 05, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/2610