S. V. Santos, L. N. Torres, T. C. da Silva, L. R. M. de Sá, J. M. Matera, and M. L. Z. Dagli, “Canine hemangiopericytomas: cell proliferation and apoptosis in the perivascular, storiform and epithelioid histological subtypes and their significance for prognosis”., Brazilian Journal of Veterinary Pathology, vol. 2, no. 1, pp. 23–28, May 2009, doi: 10.24070/bjvp.1983-0246.002005.