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Rositsa Shumkova
Research Centre of Stockbreeding and Agriculture, Agricultural AcademySmolyan, Bulgaria
Ralitsa Balkanska
Department “Special Branches”,
Institute of Animal Science, Agricultural Academy
Kostinbrod, Bulgaria
Delka Salkova
Department of Experimental Parasitology,
Institute of Experimental Morphology, Pathology and Anthropology with Museum, Bulgarian Academy of Sciences
Sofia, Bulgaria
Peter Hristov
Department of Animal Diversity and Resources,
Institute of Biodiversity and Ecosystem Research, Bulgarian Academy of Sciences
Sofia, Bulgaria