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3. Pneumoencephalography. Comparison of complications in 100 pediatric and 100 adult cases;Clark, R.A.; Obenchain, T.G.; Hanafee, W.N.; Wilson, G.H.;Radiology,1970
4. The Normal Encephalogram;Davidoff, L.M.; Dyke, C.G.,1951
5. Brain, movement and time;Dott, N.M.;British Medical Journal,1960