TRAYNOR, J. J. A consideration ofnthe accurasy and precision of fish-abundance estimates derived from echo-integration surveys. Rapp.P.-V.Reum.Cons.int.Explor.Mer. 1990, 189, 101-111
OLSEN, K. Fish behaviour and acoustic sampling. Rapp.P.-V.Reum.Cons.int.Explor.Mer. 1990, 189, 147-158
FREON, P. Consequences of fish behaviour for stock assessment. ICESmar.Sci.Symp. 1993, 196, 190-195
OLSEN, K. Quantitative estimations of the influence of fish behaviour on acoustically determined fish abundance. FAO Fish.Rep. 1983, 300, 139-149
OLSEN, K. Obseved fish reactions tu a surveying veaael with special reference to herring,cod,capelin and polar cod. FAO Fish.Rep. 1983, 300, 131-138