Karbownik, M. S., Paul, E., Nowicka, M., Nowicka, Z., Kowalczyk, R. P., Kowalczyk, E., & Pietras, T. (2019). Knowledge about dietary supplements and trust in advertising them: Development and validation of the questionnaires and preliminary results of the association between the constructs. PLoS One.

Karbownik, Michał Seweryn, Ewelina Paul, Maja Nowicka, Zuzanna Nowicka, Radosław Przemysław Kowalczyk, Edward Kowalczyk, i Tadeusz Pietras. "Knowledge About Dietary Supplements and Trust in Advertising Them: Development and Validation of the Questionnaires and Preliminary Results of the Association between the Constructs." PLoS One 2019.

Karbownik, Michał Seweryn, et al. "Knowledge About Dietary Supplements and Trust in Advertising Them: Development and Validation of the Questionnaires and Preliminary Results of the Association between the Constructs." PLoS One 2019.