1. Analgesic rebound headache in clinical practice: data from a physician survey;Rapoport;Headache,1996
2. Medication misuse headache;Mathew;Cephalalgia,1998
3. From psychoneurosis to ICHD-2: an overview of the state of the art in post-traumatic headache;Gladstone;Headache,2009
4. Willis T. De anima brutorum quae hominis vitalis ac sensitive est exercitationes duae. London, 1672. English version. Two discourses concerning the Soul of Brutes, which is that of the vital and Sensitive of Man. The Remaining Medical Works of that Famous and Renowned Physician Dr Thomas Willis, London. 1683:121–2.
5. An update on the management of chronic migraine;Evans;Headache: The Journal of Head and Face Pain,2013