Kocjan, Janusz. “Is Hypochondriasis a Significant Problem Among Polish Adolescents? An Attempt of Assessment of Severe Form of Health Anxiety in Polish Population”. Journal of Education, Health and Sport 7, no. 8 (August 20, 2017): 209–217. Accessed April 20, 2024. https://apcz.umk.pl/JEHS/article/view/4715.