1. Thunderclap headache: symptom of unruptured cerebral aneurysm;Day, W.; Raskin, N.H.;Lancet,1986
2. Thunderclap headache: is it migraine?;Harling, D.W.; Peatfield, R.C.; Van Hille, P.T.; Abbott, R.J.;Cephalalgia,1989
3. Long term follow up of 71 patients with thunderclap headache mimicking subarachnoid haemorrhage;Widjicks, E.F.M.; Kerkhoff, H.; Van Gijn, J.;Lancet,1988
4. The greater occipital neuralgia headache;Chouret, E.E.;Headache,1967
5. The anatomy of occipital neuralgia;Bogduk, N.;Clin Exp Neurol,1980