1. Born EW, Clausen B, Henriksen SvAa: Trichinella spiralis in walruses from the Thule district, North Greenland, and possible routes of transmission. Z. f. Säugetierkunde 1982, 47, 246–251.
2. Born EW, Henriksen SvAa: Prevalence of Trichinella sp. in polar bears (Ursus maritimus) from northeastern Greenland. (In preparation).
3. Dick TA: Species, and Intraspecific Variation. In: “Trichinella and Trichinosis”, Ed. W. C. Campbell, Plenum Press, New York and London 1983, pp. 31–73.
4. James ER: Trichinella Olympics. Parasitol. Today, 1989, 5, 66–67.
5. La Rosa G, Pozio E, Rossi P: New taxonomic contribution to the genus Trichinella Railliet, 1989. II. Multivariate analyses on genetic and biological data. In: ICT 7th Trichinellosis. Ed. C. E. Tanner. S.S.I.S. Press, Madrid 1989, pp. 103–108.