1. Wiltens, J., Schreiber, U., Vidaver, W., (1978) Can. J. Bot. 56: 2787–2794.
2. Krause, G.H., Wels, E.(1988) In: HK Lichtenthaler (ed) Applications of Chlorophyll Fluorescence, Kluwer Academic Publ.
3. Renger, G., Schreiber, U., (1986) In: Govindjee, Amesz J , Fork DC(eds) Light Emission by Plants and Bacteria. Academic Press, Orlando New York London, 587–619.
4. Pekić, S., and Quarrie, S.A., (1987) J.Plant. Physiol.Vol. 127 pp 203–217
5. Neumann, H.H., Thurtell, G.W.,(1973) In: Psychrometry in Water Relations Research, Brown & van Haven (eds)