1. Diaz-Munoz, F., Simultaneous stem diameter and water potential measurements. Mexicon, Cuenevaca, 1983.
2. Geddes, L.A., Electrodes and the measurement of bioelectric events. Wiley-Interscience, New York, 1972.
3. Gensler, W., Bioelectric potentials in higher plants and their relation to growth in higher plants. Ann. NY Acad. Sci
238: 2380–2399, 1974.
4. Gensler, W., Method and apparatus for electrically determining plant water status. U.S. Patent No. 3, 967, 198, 1976.
5. Gensler, W., Tissue electropotentials in Kalanchoe blossfeldiana during wound healing. Am. J. Bot. 65: 152–157, 1978.