1. Further short-term studies of the influence of the milking machine on the rate of new mastitis infections;Cousins;J. Dairy Res.,1973
2. Bovine udder infection: Time of microbial invasion of the teat sinus;McDonald,1970
3. The experimental bacterial contamination of the inner structure of the teats and the milk of cows;McEwen;Vet. Rec.,1946
4. National Mastitis Council. 1965. Page 34 in Current concepts of bovine mastitis.
5. Noorlander, D.O. 1960. Page 214 in Milking machines and mastitis. Compton Press