1. Some recent observations on the age and growth of eels;Dahl,1967
2. The problem of supernumarary zones in otoliths of the European eel (Anguilla anguilla (Linnaeus, 1758); a suggestion to cope with it;Deelder;Aquaculture,1976
3. Über altersbestimmungen und wachstum beim aal;Ehrenbaum;Z. Fisch. Deren Hilfswiss.,1913
4. An improved technique for preparing ell otoliths for ageing;Hu;N.Z. J. Mar. Freshwater Res.,1981
5. Age determination of American eels based on the structure of their otoliths;Liew,1974