I. Korona-Glowniak, R. Siwiec, I. Luszczewska-Sierakowska, R. Maciejewski, R. Wrobel, and A. Malm, “Microbiological evaluation of 10 commercial probiotic products available in Poland”, Curr. Issues Pharm. Med. Sci., vol. 32, no. 3, pp. 121–124, Sep. 2019, doi: 10.2478/cipms-2019-0022.