Coba jelasin Semon, pangeran Gluckowski. dari Mikhail dari Chernigov dong

DiPlano Carpini, Giovanni (Author) - Hildinger, Erik (Translator): The Story of the Mongols whom We Call the Tartars; Branden Publishing Company, Inc, 1996, Boston, MA; .

Thurston, Herbert, S.J. (Editor): Butler's Lives of the Saints - September; Burns & Oates / Search Press Limited, 1999; .

Vernadsky, George: Kievan Russia; Yale University Press, 1948, New Haven and London; .

Baumgarten, Nicolas. Généalogies et mariages occidentaux des Rurikides russes du Xe au XIIIe siècle. Orientalia christiana 9, no. 35 (1927).