Mutoni G, Prasad S, De K, Pal S, Mukherjee J, Kapila S, Kapila R, Kaur H, Mohanty A K and Dan A K 2012:
Effect of supplementation of vitamin E, copper and zinc around peripartum on udder health, milk yield and composition of Sahiwal cows.
Livestock Research for Rural Development. Volume 24, Article #220.
, from http://www.lrrd.org/lrrd24/12/muto24220.htm