Gradskijat arhiv v zapadnopontijskite i trakijskite gradove prez elinističeskata epoha (dn - Ivanov, Teofil Krăstev 1918-1999 (Poseliščten život v Drevna Trakija. Studies on settlement life in ancient Thrace. Proceedings of the 3rd International Symposium "Cabyle", 17-21 may 1993, Jambol., 1994)