Dominik, H., W. Pawęska, and B. Dominik. “Gastrointestinal Tract Carcinoid With Carcinoid Syndrome in 63-Year-Old Diver – a Case Report”. Journal of Education, Health and Sport, vol. 22, no. 1, July 2023, pp. 139-46, doi:10.12775/JEHS.2023.22.01.011.