Cichońska, Dominika, Michał Marczak, Anna Raczkiewicz, and Aleksandra Sierocka. 2009. “International Classification of Functioning, Disability and Health (ICF) in Medical Certification of Disability”. Polish Journal of Public Health 119 (1): 7-13. https://czasopisma.umlub.pl/pjph/article/view/2125.