Sergey Aleksandrovich Golovin. “Interim Results of Studies of the Royal Remains from the Necropolis of the Ascension Cathedral of the Moscow Kremlin”. Global Journal of Human-Social Science, vol. 20, no. D1, Jan. 2020, pp. 1-19, https://socialscienceresearch.org/index.php/GJHSS/article/view/3095.