Sergazina, Karlygash T. “Procopius Lupkin and Ivan Suslov: Saints, Blasphemers, False Christs, Anti-Christs?”. State, Religion and Church 35, no. 2 (March 15, 2017): 105–122. Accessed November 7, 2026. https://state-religion-church.owebs.ru/article/view/11016.