Literature cited
- Batten , F. Mortimer . 1920 . British Wild Mammals
- Crew , F. A. E. 1927 . The Genetics of Sexuality in Animals
- Dugmore , A. R. 1913 . The Romance of the Newfoundland Caribou
- Huxley , J. S. 1926 . The Annual Increment in the Antlers of the Red Deer (Cervus elaphus) . P. Z. S. , : 1021 – 1035 .
- Stefansson , V. 1922 . The Friendly Arctic