Studia Universitatis Vasile Goldis Seria Stiintele Vietii (Life Sciences Series). 2010, Vol. 20 Issue 4, p21-25. 5p. 4 Black and White Photographs, 1 Graph.
Bulletin of the University of Agricultural Sciences & Veterinary Medicine Cluj-Napoca. Veterinary Medicine; 2008, Vol. 65 Issue 1, p370-375, 6p, 4 Black and White Photographs, 1 Graph