Mudyń, K. “Feeling of Unreality and Its Contexts. The Phenomenological Aspects of Dissociative Processes”. Annales Universitatis Paedagogicae Cracoviensis Studia Psychologica, vol. 5, no. 1, Dec. 2012, pp. 85-100, https://studia-psychologica.uken.krakow.pl/article/view/5581.