1. Abdelhadi, L.O., Santini, F.J. and Gagliostro, G.A., 2001. Whole plant silage as a supplement for grazing cattle: Effects on productive performance and ruminal environment (a review), Revista Argentina de Producción Animal 21, 147–158. Retrieved December 4, 2011, from http://www.produccion-animal.com.ar/produccion_y_manejo_reservas/reservas_silos/123-AAPA_2001.pdf
2. Bailey, K. and Ishler, V., 2007. Tracking milk prices and feed costs, (The Pennsylvania State University, USA). Retrieved July 29, 2012, from http://pubs.cas.psu.edu/freepubs/pdfs/ua443.pdf
3. Costa, M.G., Campos, J.M.S., Valadares Filho, S.C., Valadares, R.F.D., Mendonça, S.S., Souza, D.P., Teixeira, M.P., 2005. Desempenho produtivo de vacas leiteiras alimentadas com diferentes proporções de cana-de-açúcar e concentrado ou silagem de milho na dieta, Revista Brasileira de Zootecnia, 34, 2437–2445
4. Davison, T.M., Marschke, R.J. and Brown, G.W., 1982. Milk yields from feeding maize silage and meat-and-bone meal to Friesian cows grazing tropical grass and legume pasture, Australian Journal of Experimental Agriculture and Animal Husbandry, 22, 147–154
5. Gradiz, L., Alvarado, L., Kahi, A.K. and Hirooka, H., 2009. Fit of Wood's function to daily milk records and estimation of environmental and additive and non-additive genetic effects on lactation curve and lactation parameters of crossbred dual purpose cattle, Livestock Science, 124, 321–329