Chelis, - Gergova, Diana; Chakalova, N. (Izdatelska Kǎšta "Paraf", 1994)
"... comprises the papers delivered at the conference dedicated to the 10th anniversary of the start of systematic archaeological investigations of the Getic religious and political centre from the 1st millenium BC in Sboryanovo and the 25th anniversary of the Convention on the Protection of the World Cultural Heritage, which was held in Isperih, 10-14 October 1992."
Added t.p. in English.
At head of title: Archeologičeski Institut i Muzej - Bǎlgarska Akademija na Naukite; Istoričeski Muzej - Isperich.