Goroda i stepi Kryma v XIII-XIV vv. po archeologičeskim svidetel'stvam. (Cities and steppe of the Crimea in the 13th-14th centuries according to archaeological data) - Ajbabin, Aleksandr Il'ič (Materialy po Archeologii, Istorii i Etnografii Tavrii, 10 (2003), 2003)