G. Nikbakht Brujeni, T. Taghi Poorbazargani, S. Nadin-Davis, M. Tolooie, and N. Barjesteh, “Bovine immunodeficiency virus and bovine leukemia virus and their mixed infection in Iranian Holstein cattle”, J Infect Dev Ctries, vol. 4, no. 09, pp. 576–579, Jul. 2010.