Zhelnova, Elena Gennadievna. “Graphicsheritage by P.I. Sokolov. The Dawn of Artistic Education in Russia: УДК741.021.2”. The Art of Eurasia, no. 1 (12), Mar. 2019, pp. 117-2, https://doi.org/10.25712/ASTU.2518-7767.2019.01.009.