1. A.V. Drozdov and A.F. Mandych, Black Sea environment, GeJournal 27(2) (1992) 139–140.
2. L.D. Mee, The Black Sea in crises: the need for concerted international action, Ambio 24 (1992) 278–286.
3. E. Ozsoy, M.A. Latif, S. Tugrul and U. Unluata, Exchanges with the mediterranean, fluxes and the boundary mixing processes in the Black Sea, presented at the Black Sea Symposium, International Commission for the Science and Exploration of the Mediterranean Sea, Trieste, 12–17 October (1992).
4. E.I. Musayeva, Mesoplankton near the Bulgarian Coast, Oceanology 25 (1985) 647–652.
5. D. Tolmazin, Changing coastal oceanography of the Black Sea, I. Northwestern Shelf, Prog. Oceanogr. 15 (1985) 217–276.