Dukhovnye iskanii︠a︡ na Rusi kont︠s︡a XV v. /
Grigorenko, A. I︠U︡.(Andreĭ I︠U︡rʹevich)
Sankt-Peterburg : "Ėĭdos",
1999.
Orthodox Eastern Church
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ