Mel Copeland. Translation of the Phrygian language(нявызн.). — «The second inscription is a rock-text near Sitovo village at 30 km south-east of Plovdiv in the Rhodopes Range. After their own autopsia Bayun-Orel 1991, 144-148, dated the inscription in III-I c. B.C. and saw on the rock "Ipta" as "figurine, cult object, image (in paredria?) with Bacchus' figurine."» [sic]
Vassileva, Maya (1999) A Few Phrygian Onomastic Notes. Epigraphica Anatolica : Zeitschrift für Epigraphik und historische Geographie Anatoliens (31). pp. 175—180. ISSN0174-6545
