Aschoff, A; Kremer, Paul; Hashemi, Bahram; Kunze, Stefan (1999). "The scientific history of hydrocephalus and its treatment". Neurosurgical Review. 22 (2–3): 67–93, discussion 94–5. doi:10.1007/s101430050035. PMID 10547004. S2CID 10077885.
Shevel, E; Spierings, EH (April 2004). "Role of the extracranial arteries in migraine headache: a review". Cranio: The Journal of Craniomandibular Practice. 22 (2): 132–6. doi:10.1179/crn.2004.017. PMID 15134413. S2CID 12318511.