Pereira Lima Maria Lúcia , Berchielli Telma Teresinha, Leme P R, Ramos Nogueira José and Pinheiro Maria da Graça 2004: Grazing time and milk production of crossbred cows in a rotational area of Elephant grass and Tanzania grass. Livestock Research for Rural Development. Vol. 16, Art. #88. Retrieved , from http://www.lrrd.org/lrrd16/11/pere16088.htm