@article{beare_mckenzie_1999, title={Temporal patterns in the surface abundance of Calanus finmarchicus and C. helgolandicus in the northern North Sea (1958-1996) inferred from Continuous Plankton Recorder data}, volume={190}, DOI={10.3354/meps190241}, publisher={Inter-Research Science Center}, author={Beare and McKenzie}, year={1999} }