Imperatorska︠i︡a akademī︠i︡a nauk (Russia) & Bezobrazov, P. V. (1910). Materīaly dl︠i︡a bīografīi episkopa Porfirī︠i︡a Uspenskago. Tip. V.Th. Kirshbauma.
Lua i Stíl Chicago (17ú heag.)Imperatorska︠i︡a akademī︠i︡a nauk (Russia) agus P. V. Bezobrazov. Materīaly Dl︠i︡a Bīografīi Episkopa Porfirī︠i︡a Uspenskago. S.-Peterburg: Tip. V.Th. Kirshbauma, 1910.
Lua MLA (8ú heag.)Imperatorska︠i︡a akademī︠i︡a nauk (Russia) agus P. V. Bezobrazov. Materīaly Dl︠i︡a Bīografīi Episkopa Porfirī︠i︡a Uspenskago. Tip. V.Th. Kirshbauma, 1910.
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