- Dimnik, Martin. The dynasty of Chernigov - 1146-1246.
- Charles Cawley. Russia, Rurikids - Grand Princes of Kiev, Princes of Chernigov, descendants of Sviatoslav II, Grand Prince of Kiev (fourth son of Iaroslav I). Medieval Lands. Foundation of Medieval Genealogy. 2009-03-14 [2009-04-08]. （原始内容存档于2020-06-07）.
- A number of historians claim Igor died in 1202; he most probably died in the spring of 1201, because most chronicles place the news of his death as the first entry for the year; Dimnik, Martin op. cit p. 237.