Maximovich, Kirill MPI for European Legal History, Max Planck Society;
Maximovich, K. (2010). Patriarch Mefodij I (843-847 gg.) i teorija “pentarchii. In XX Bogoslovskaja konferencija PSTGU, Moskva, 9-14 Oktjabrja 2009 g. Materialy. M. (pp. 173-178). Moskau.