Grigg, H., S.J. Bardwell & S. Tyzack. (1981). Patterns of variation in the prosome length of overwintering stage V copepodites of Calanus finmarchicus in the Firth of Clyde. Journal of the Marine Biological Association of the United Kingdom 61(4):885-899, figs. 1-8, tabs. 1-3. (9-xi-1981)