In J. Olesen, P. Goadsby, N. Ramadan, P. Tfelt-Hansen, & K.M.A Welch, The Headaches
Penzien, D.B., Rains, J.C., & McGrath, P.J. In J. Olesen, P. Goadsby, N. Ramadan, P. Tfelt-Hansen, & K.M.A Welch, The Headaches. Psychological and behavioral treatments of migraine. 2006; 441-448.