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4. W. S. Hoar, “Smolt Transformation: Evolution, Behaviour and Physiology,” J. Fish. Res. Board Can. 33(6), 1233–1252 (1976).
5. S. E. Jonston and J. G. Eales, “Purines in the Integument of the Atlantic Salmon (Salmo salar) During Parr-Smolt Transformation,” J. Fish. Res. Board Can. 24, 955–964 (1967).