1. Andrev G, Simeonov V (1982) Oceanology, in press
2. Bojanov E, Vuchkov I (1973) In: Statistical methods for modelling and optimization of multi-factorial objects, Technika, Sofia
3. Box GEP (1963) In: Design and analysis of industrial experiments, Davis OL (ed) Hafner Publ Co, New York
4. Boyden CR (1975) Mar Pollut Bull 6:180
5. Bruegmann L (1979) Int. Council for Exploitation of the Sea, Report CM/E: 35