Wróblewska, I., Wróblewska, Z. and Manulik, S. (2019) “Quality of life of elderly people with gastrointestinal malignant tumors”, Journal of Education, Health and Sport, 9(3), pp. 85–96. Available at: https://apcz.umk.pl/JEHS/article/view/6654 (Accessed: 8 March 2025).