What the fellow says:
"Through the expertise and experience I gained, I managed to obtain a Ph.D. in 2005 and I have been subsequently promoted to do postgraduate research."
Naval Academy, Varna, Bulgaria: Master’s Degrees in Oceanography and Ecology and Environmental Protection (October 1997)
Wave regime in open sea in front of the Bulgarian coast on the basis of hindcast data. In: Proc. 4th Int. Conf. on Marine Industry “MARIND’2002”, pp. 325-330, Varna, Bulgaria, 2002, N. Valchev, Z. Cherneva.
Wave characteristics in open sea in front of the Bulgarian coast. In: Second Int. Conf. “Oceanography of the Eastern Mediterranean and the Black Sea”, pp.196-200, Ankara, Turkey, 2003, N. Valchev, Z. Cherneva, C.G. Soares.
Transformation of wind wave spectrum parameters according to the Black Sea International Experiments. In: Second Int. Conf. “Oceanography of the Eastern Mediterranean and the Black Sea”, pp. 201-205, Ankara, Turkey, 2003, I. Davidan, Z. Belberov, D. Aubrey, I. Lavrenov, Z. Cherneva, E. Trifonova, N. Valchev.