Sobczak M F, Olivo C J, Gabbi A M, Charão P S, Heimerdinger A, da Silva J H S, Pereira L E T, Ziech M F and Rossarolla G 2005: Evaluation of an elephant grass pasture mixed with black oats managed under agro ecological principles in the winter period. Livestock Research for Rural Development. Vol. 17, Art. #71. Retrieved
, from http://www.lrrd.org/lrrd17/6/fati17071.htm