Kopeć, M., and J. F. Terelak. “Cognitive Styles and Stress Coping Styles in Person With Chronic Pain of Spinal Column”. Studia Psychologica: Theoria Et Praxis, no. 9, Aug. 2009, pp. 57-74, https://czasopisma.uksw.edu.pl/index.php/sp/article/view/2707.