1. Braak, J. W. G. ter, W. A. M. Grandia andM. de Vlieger, “Echoencephalography” as an aid in the diagnosis of subdural and extradural hematomas. Recent neurological research, p. 37–45, Elsevier publishing Company, Amsterdam, 1959.
2. Gordon, D. M., Echoencéphalographie. Rev. neurol. Paris,99 (1958), 652–653.
3. Gordon, D. M., Echoencephalography. Brit. Med. J.5136 (1959), 1500–1504.
4. Jefferson, A., Some experiences with echo-encephalography. J. Neurol., London,22 (1959), 83–84.
5. Leksell, L., Echoencephalography I. Acta chir. Scand.110 (1955), 301–315.