K. Suliga, T. Grzelak, J. Grupińska, M. Pelczyńska, M. Sperling, and K. Czyżewska, “Evaluation of using dietary supplements among polish adult people below and over 60 years of age”, JMS, vol. 86, no. 3, pp. 213–219, Sep. 2017, doi: 10.20883/jms.2017.194.