[c] N. I. Kostomarov, Russian History.
[d] P. Strahl and E. Hermann, Geschichte des Russischen Staates.
[e] A. Rambaud, Histoire de la Russie.
[f] N. Karamzin, History of the Russian Empire.
[g] R. Bell, History of Russia.
[h] S. M. Soloviov, History of Russia from the Earliest Times.
Chapter V. The Century After Ivan the Terrible (1584-1682 A.D.)
[b] Prosper Mérimée, Demetrius the Impostor.
[c] N. I. Kostomarov, Russian History.
[d] N. Karamzin, History of the Russian Empire.