Stobo, W. T. and Fowler, G. M. (2001) “Sealworm (Pseudoterranova decipiens) dynamics in Sable Island grey seals (Halichoerus grypus): seasonal fluctuations and other changes in worm infections during the 1980s”, NAMMCO Scientific Publications. Tromsø, Norway, 3, pp. 129–147. doi: 10.7557/3.2963.