Drop, B., A. Barańska, E. Firlej, M. Janiszewska, and M. Jędrych. “Palliative Care and the Growing Health Needs of Older People in Poland”. Journal of Education, Health and Sport, vol. 7, no. 7, July 2017, pp. 959-68, https://apcz.umk.pl/JEHS/article/view/4858.