fatemeh Ghaffari, parvaneh Mohammadkhani, abbas Pourshahbaz, behrooz Dolatshahi, and farzaneh Mohammadi, “The effectiveness of Group Metacognitive Therapy on anxiety thought and improvement thought control strategy in patients with generalized anxiety disorder”, Adv Nurs Midwifery, vol. 23, no. 81, pp. 66–76, Mar. 2014.