Pinheiro, Rafael Silvio Bonilha, et al. “Measurements Repeated in Time Carried Out by Ultrasound in Discard Ewes in Different Physiological Stages”. Semina: Ciências Agrárias, vol. 35, no. 4Supl, Sept. 2014, pp. 2739-48, doi:10.5433/1679-0359.2014v35n4Suplp2739.