Jóźwik A, Frymus T, Mizak B, Rzezutka A
Department of Clinical Sciences, Faculty of Veterinary Medicine, Warsaw Agricultural University, Warsaw, Poland.
J Vet Med B Infect Dis Vet Public Health. 2004 Apr;51(3):99-103. doi: 10.1111/j.1439-0450.2004.00738.x.