Vertical migration and dispersion of sprat (Sprattus sprattus) and herring (Clupea harengus) schools at dusk in the Baltic SeaL. A. Fredrik Nilsson, Uffe Høgsbro Thygesen, Bo Lundgren, Bo Friis Nielsen, J. Rasmus Nielsen and Jan E. BeyerAquat. Living Resour., 16 3 (2003) 317-324DOI: https://doi.org/10.1016/S0990-7440(03)00039-1
