Żychlińska, K., and W. Stefańska. “Sense of Coherence and Coping With Chronic Illness in People With Multiple Sclerosis”. The Journal of Neurological and Neurosurgical Nursing, vol. 2, no. 5, June 2014, pp. 195-04, https://apcz.umk.pl/PNIN/article/view/38845.