Plasse D, Bauer B, Galdo E and Verde O 2005: Production of two composite beef cattle herds of Zebu x Criollo Yacumeño and Charolais x Zebu x Criollo Yacumeño on floodable savanna in Beni, Bolivia I. Weaning weights. Livestock Research for Rural Development. Volume 17, Article #82. Retrieved , from http://www.lrrd.org/lrrd17/7/plas17082.htm