Tasoskite amforni pečati ot m : "Kostadin češma" i importăt na ostrova v rajona na Burgaskija zaliv. The Thasian amphorae stamps from "Kostadin cheshma" and the import of Thasian production in the Bourgas gulf region. - Balabanov, Petăr (Bălgarska Akademija na Naukite, Sofija, 2005)