6de Sousa IK, Hamad Minervino AH, Sousa Rdos S, Chaves DF, Soares HS, Barros Ide O, de Arafijo CA, Jfinior RA, Ortolani EL. Copper deficiency in sheep with high liver iron accumulation. Vet Med Int. 2012;2012:207950. doi: 10. 1155/ 2012/207950.
7B. F. Fell, C. Farquharson, Gwen I. Riddoch. Kidney lesions in copper - deficient rats Journal of Comparative Pathology, Volume 97, Issue 2 ,March 1987 ,Pages 187--196.
8Abd E1 Ghany Hefnawy, J. L. T6rtora - P6rez. The importance of selenium and the effects of its deficiency in animal health Small Ruminant Research, Volume 89, Issues 2 - 3, April2010,Pages 185--192.
9N. R Kendall, A. M Mackenzie, S. B Telfer Effect of a copper, cobalt and selenium soluble glass bolus given to grazing sheep. Livestock Production Science, Volume 68, Issue 1, February 2001 ,Pages 31--39.
