Simili F F, Lima M L P, Medeiros M I M, Roma Júnior L C, Paz C C P and Reis R A 2018:  
Milk yield of crossbred cattle grazing sorghum sudangrass hybrid with concentrate supplementation during dry season. 
 Livestock Research for Rural Development. Volume 30, Article #70. 
 Retrieved 
, from http://www.lrrd.org/lrrd30/4/flavi30070.html