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Publisher
- mdpi6
- sciendo6
- institute of agricultural economics - agricultural academy in bulgaria4
- university of agronomical medical sciences & veterinary medicine bucharest4
- edp sciences3
- walter de gruyter gmbh3
- "prof. marin drinov" publishing house of bulgarian academy of sciences2
- archiv fur tierzucht, dummerstorf2
- copernicus gesellschaft mbh2