Fedotov, G. P. (ed.), A Treasury of Russian Spirituality (London: Sheed & Ward, 1950), p. 45. Quoted in Speake, Graham (2018). A history of the Athonite Commonwealth: the spiritual and cultural diaspora of Mount Athos. New York. p. 74. ISBN978-1-108-34922-2. OCLC1041501028.{{cite book}}: CS1 maint: location missing publisher (link)
