Pneumocephalus by Valsalva's Maneuver
Neurol 60:345-346, Schrijver,H.M. &Berendse,H.W., 2003
A Sneezer's Headache
Neurol 53:654-655, Kurita,H.,et al, 1999
Pneumocephalus
In:Vinken P. J. & Bruyn, G. W. Ed, Handbook of Clinical Neurology, Vol 24, North-Holland Publ Co, Am, terdam, 197Markham, J. W., 1976