Olszak, Cecylia, Elżbieta Nowicka, Bożena Baczewska, Robert Jan Łuczyk, Beata Kropornicka, Ewa Krzyżanowska, and Jadwiga Daniluk. 2017. “Attitude of Patients With Type 2 Diabetes towards the Disease Versus Chosen Sociodemographic and Medical Factors – Psychometric Properties of the DAS-3 Scale in the Polish Version”. Journal of Education, Health and Sport 7 (12):248-61. https://apcz.umk.pl/JEHS/article/view/5158.