Tsonev P, Gulubinov G, Kamburov G
Vet Med Nauki. 1975;12(2):112-9.
Studied were the values of 26 linear measurements of the udder in 50 normal cows and in 50 cows affected with subclinical mastitis, the animals used being of the Bulgarian Brown breed. A total of 19 indexes were established for each group.
对50头正常奶牛和50头患有亚临床乳腺炎的奶牛（均为保加利亚褐牛品种）的乳房进行了26项线性测量，并记录了测量值。每组共建立了19个指标。
