Theriogenology,  Brym P., Gene promoter polymorphisms in boar spermatozoa differing infreezability, Wasilewska-Sakowska K., Mogielnicka-Brzozowska M., Mańkowska A., Paukszto Ł., Pareek Ch.S., Kordan W., Kondracki S., Fraser L., 2021, 166 (2021), 112-123 

Applied Animal Science, GENETICS AND BREEDING, Co-occurrence of kappa-casein B and beta-casein A1 alleles in Holstein bulls, Kamiński S., 2021, Volume 37, 122-125