FIRSOV, Sergei. “Legend about Tsar’s Brother: Grand Duke Mikhail Aleksandrovich - Seraphim, Patriarch Solovetsky”. State, Religion and Church 28, no. 4 (July 15, 2010): 209–225. Accessed November 7, 2026. https://state-religion-church.owebs.ru/article/view/10514.