Kulik, K., Z. Fryska, A. Wołejko, J. Kuciński, P. Semeniuk, K. Matusz, R. Burczyk, N. Górna, and A. Łabuda. “Celiac Disease and Non-Celiac Gluten Sensitivity – Characteristics and Differences”. Journal of Education, Health and Sport, vol. 26, no. 1, May 2023, pp. 49-62, doi:10.12775/JEHS.2023.26.01.007.