Bondarenko, A. F., and K. S. Maksimenko. “Experimental Study of Person-Centered Psychotherapy in Somatogenic Disorders Treatment (A Study of Chronic Gastrointestinal Diseases)”. Psychological Counseling and Psychotherapy, no. 10, Jan. 2019, pp. 11-20, doi:10.26565/2410-1249-2018-10-02.