Bibliometric analysis of yak based on the China National Knowledge Infrastructure database

• ZHOU Xuelan, 
• WU Xiaoyun, 
• LIANG Chunnian, 
• GUO Xian, 
• DING Xuezhi, 
• CHU Min, 
• WANG Hongbo, 
• PEI Jie, 
• BAO Pengjia, 
• YAN Ping