Issa, É.C.; W. Jorge; A.A. Egito; J.R.B. Sereno (2009). „Cytogenic analysis of the Y chromosome of native Brazilian bovine breeds“. Archivos de Zootecnia. 58-jild, № 221. 93–101-bet. doi:10.4321/S0004-05922009000100010. ISSN0004-0592.
McManus, C.; E. Prescott; G. Paludo; E. Bianchini; H. Louvandini; A. Mariante (February 2009). „Heat tolerance in naturalized Brazilian cattle breeds“. Livestock Science. 120-jild, № 3. 256–264-bet. doi:10.1016/j.livsci.2008.07.014.
„Endangered cows cloned“ (en). The Sydney Morning Herald (2005-yil 22-may). Qaraldi: 2021-yil 19-may.
worldcat.org
Issa, É.C.; W. Jorge; A.A. Egito; J.R.B. Sereno (2009). „Cytogenic analysis of the Y chromosome of native Brazilian bovine breeds“. Archivos de Zootecnia. 58-jild, № 221. 93–101-bet. doi:10.4321/S0004-05922009000100010. ISSN0004-0592.