1. Haenlein G F W. Past, present, and future perspectives of small ruminant dairy research. J Dairy Sci, 2001, 84: 2097-2115.
2. Zhang Y. Animal Breeding (in Chinese). 2nd ed. Beijing: China Agriculture Press, 2018. 1–12 [张沅. 家畜育种学. 第2版. 北京: 中国农业出版社, 2018. 1–12].
3. Liu C S, Li L L, Zhang S L, et al. Dairy Herd Improvement and Application (in Chinese). Beijing: China Agriculture Press, 2016 [刘丑生, 李丽丽, 张胜利, 等. 奶牛生产性能测定及应用. 北京: 中国农业出版社, 2016].
4. Technical specification of Chinese Holstein cattle performance test (in Chinese). NY/T 1450-2007 [中国荷斯坦牛生产性能测定技术规范. NY/T 1450-2007].
5. Li G W. Chinese Students Drinking Granny Source Management Technical Manual (in Chinese). Beijing: China Agriculture Press, 2006. 97–100 [李伟国. 中国学生饮用奶奶源管理技术手册. 北京: 中国农业出版社, 2006. 97–100].