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| | Soay sheep project data |
 | | Coulson T., Catchpole E.A., Albon S.D., Morgan B.J.T., Pemberton J.M., Clutton-Brock T.H., Crawley M.J. & Grenfell B.T. (2001) Age, sex, density, winter weather, and population crashes in Soay sheep. |
 | | Robertson A., Hiraiwahasegawa M., Albon S. & Clutton-Brock T. (1992) Early growth and sucking behavior of Soay sheep in a fluctuating population. |
 | | Jewell P.A. (1997) Survival and behaviour of castrated Soay sheep (Ovis aries) in a feral island population on Hirta, St. Kilda, Scotland. |
| www.cpb.bio.ic.ac.uk /lits/sheepmetadata.html (1403 words) |
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