May, A.; Leone, M.; Áfra, J.; Linde, M.; Sándor, P. S.; Evers, S.; Goadsby, P. J. «EFNS guidelines on the treatment of cluster headache and other trigeminal-autonomic cephalalgias». European Journal of Neurology, 13, 10, 2006, pàg. 1066–77. DOI: 10.1111/j.1468-1331.2006.01566.x. PMID: 16987158.
May, A.; Leone, M.; Áfra, J.; Linde, M.; Sándor, P. S.; Evers, S.; Goadsby, P. J. «EFNS guidelines on the treatment of cluster headache and other trigeminal-autonomic cephalalgias». European Journal of Neurology, 13, 10, 2006, pàg. 1066–77. DOI: 10.1111/j.1468-1331.2006.01566.x. PMID: 16987158.