1. Conservation biology: an evolutionary-ecological perspective;Wilcox,1980
2. Are cattle, sheep, and goats endangered species?;Taberlet;Mol. Ecol.,2008
3. FAO, Animal genetic resources - Conservation and management, proceedings of the FAO/UNEP technical consultation, Food and Agriculture Organization of the United Nations, Rome, 1981.
4. B. Rischkowsky, D. Pilling (Eds.), The state of the world's animal genetic resources for food and agriculture, Food and Agriculture Organization of the United Nations, Rome, Italy, 2007.
5. Conserve livestock genetic resources, too;Boettcher;Science,2009