Alkon D L, Etcheberrigaray R, Rojas E
Laboratory of Adaptive Systems, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, Maryland 20852.
Biophys J. 1993 Nov;65(5):1755-6. doi: 10.1016/S0006-3495(93)81232-3.