RATVAJ, Marek et al. Effect of administration of probiotic lactobacilli in pollen carrier on honey bee gut microbiota and antimicrobial peptides. In Scientific Conference of the Veterinary Medicine Students. 4th International Scientific Conference of the Veterinary Medicine Students „Non sibi sed omnibus – not for themselves, but for everybody”, 27th - 28th September 2018. 1. vyd. - Warsaw : SGGW, 2018, s. 57.