Before revision: Mongolia Archaeological sources also suggest that routes may have connected Mongolia to Eastern Europe during the Kitan/Liao Period .Valerie Hansen, "International Gifting and the Kitan World, 907-1125," Journal of Song-Yuan Studies 43 (2013), 298-301 .
After revision: Mongolia Sources of archaeological finds suggest that routes may have connected Mongolia to eastern Europe during the Kitan/Liao Period also .