Soncini, Ricardo Alfredo, and Nelson Mores. “Importance of Bursa Body Weight Ration in the Identification of Chickens With Bursa Lesioned by the Infectious Bursal Disease Virus”. Pesquisa Agropecuaria Brasileira, vol. 24, no. 1, Apr. 2014, pp. 59-61, doi:10.1590/S1678-3921.pab1989.v24.13749.