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ŁUCZYK, Robert Jan, DERYŁO, Karolina, ŁUCZYK, Marta, WAWRYNIUK, Agnieszka and SIKORA, Kamil. Stress level and ways of coping with stress in a group of patients with unstable coronary heart disease. Journal of Education, Health and Sport. Online. 28 June 2021. Vol. 11, no. 6, pp. 164-169. [Accessed 1 September 2024]. DOI 10.12775/JEHS.2021.11.06.017.