History and present status of populations of harp and hooded seals : SERGEANT D. E., 1976. Biol. Conserv., 10 (2): 95–1181977

Seal hunting is no joking matterSERGEANT, D.E. · 1983

Whaling quotasSERGEANT, D.E. · 1983

[Elsevier Oceanography Series] Canadian Inland Seas Volume 44 || Chapter 16 Sea MammalsSergeant, D.E. · 1986

Irish whales and whaling: By James Fairlie. Blackstaff Press, Belfast. 1981. 234 pp. Price: £8·95D.E. Sergeant · 1982

An update of the status of white whales Delphinapterus leucas in the Saint Lawrence estuary, CanadaD.E. Sergeant; W. Hoek · 1988