Galbas, Mariola, Marek Selwet, Michał Koczorowski, and Filip Porzucek. 2015. “Impact of Rearing System of Rosa Breed Laying Hens on Occurrence and Antibiotic Resistance Hens on Occurrence and Antibiotic Resistance”. Biotechnology and Food Science 79 (1), 3-8. https://doi.org/10.34658/bfs.2015.79.1.9-22.