1. Salzberg, B. M., Davila, H. V. & Cohen, L. B. Nature 246, 508–509 (1973).
2. Salzberg, B. M. in Current Methods in Cellular Neurobiology (ed. Barker, J. L.) 139–187 (Wiley, New York, 1983).
3. Grinvald, A. A. Rev. Neurosci. 8, 263–305 (1985).
4. Cohen, L. B. & Lesher, S. L. in Optical Methods in Cell Physiology (eds DeWeer, P. & Salzberg, B. M.) 71–99 (Wiley, New York, 1986).
5. Orbach, H. S., Cohen, L. B. & Grinvald, A. J. Neurosci. 5, 1553–1564 (1985).