Pereira, Gislene, et al. “Sheep Erythrocyte Sensitisation and Restriction to Lysis by the Complement System from Equine and Sheep Serum”. Brazilian Journal of Veterinary Research and Animal Science, vol. 32, no. 3, Sept. 1995, pp. 155-9, https://doi.org/10.11606/issn.1678-4456.bjvras.1994.52102.