Authors
Evgeni Petkov
Agricultural Academy, Institute of Animal Science-Kostinbrod, Kostinbrod, Bulgaria
Teodora Popova
Agricultural Academy, Institute of Animal Science-Kostinbrod, Kostinbrod, Bulgaria
Maya Ignatova
Agricultural Academy, Institute of Animal Science-Kostinbrod, Kostinbrod, Bulgaria
Vania Sharkova
Agricultural Academy, Institute of Animal Science-Kostinbrod, Kostinbrod, Bulgaria
Krasimir Dimov
Agricultural Academy, Institute of Cryobiology and Food Technologies, Sofia, Bulgaria