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2. Do the effects of cognitive therapy endure? A two year follow-up of tension headache sufferers treated with cognitive therapy or biofeedback;Holroyd,1980
3. A biochemical explanation for the biofeedback treatment of migraine;Mathew,1979
4. Trahan, D. E., & Cimbolic, P. Biofeedback and progressive relaxation in the treatment of muscle tension headaches: A comparison. Unpublished manuscript, North Texas State University, Denton, TX.
5. Migraine headache: Review of parameters, etiology, and intervention;Adams;Psychological Bulletin,1980