Heidari, F., Askary, P., Heidari, A., Pasha, R., & Makvandi, B. "The Effects of Cognitive-Behavioral Therapy on Psychological Flexibility and Rumination in Patients with Non-Cardiac Chest Pains", Community Health Journal, 12, 1, 2018, 30-40. doi: 10.22123/chj.2018.127159.1119