1. Geology and Hydrology of the Western Section of the Black Sea. Publ. House of BAS, Sofia, 292 (1979).
2. The Western (Roumelian) sector of the Black Sea depression;Krustev,2002
3. Geomorphology of the Bulgarian Black Sea Coast and Shelf, Sofia, Publ;Popov,1974
4. Assessment Report of Marine Environmental Status, Contract No 0-33-18 from 06.12.2013 between the Bulgarian Ministry of Environment and Water and the Institute of Oceanology, BAS, Varna, for Implementation of Obligations under the Monitoring of the Black Sea, on the Grounds of Article 171 (2013) § 2, Item 3 of the Water Act, 370 (2013).
5. Application of Multi-Beam Echo-Sounding in seabed geological mapping;Prodanov,2015