Scheldt species source details
John, H.C., E. Mittelstaedt & K. Schulz. (1998). The boundary circulation along the European continental slope as transport vehicle for two calanoid copepods in the Bay of Biscay. Oceanologica Acta 21(2):307-318.
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John, H.C., E. Mittelstaedt & K. Schulz
1998
The boundary circulation along the European continental slope as transport vehicle for two calanoid copepods in the Bay of Biscay.
Oceanologica Acta
21(2):307-318.
Publication
Available in Wilson Copepod Library (non-digital)
Available for editors 
Calanus helgolandicus (Claus, 1863) represented as Calanus helgolandicus helgolandicus (Claus, 1863) (additional source)