1. Beinsberger, S., Valcke, R., Clijsters, H.M., De Greef, J.A., Van Onckelen, H.A. (1992) in Physiology and Biochemistry of Cytokinins in Plants (Kamínek, M., Mok, W.S., Zažímalová, E., ed.) pp. 77–82, SPB Academic Publishing, The Hague, The Netherlands
2. Incoll, I. and Jewer, P.C. (1987) in Stomata Functioning (Zeiger, E., Farquhar, G.D., Cowan, I.R., ed.) pp. 281, Stanford University Press, Stanford
3. Synková, H., Wilhehnová, N., Šestik, Z., Pospíšilová, J. (1996) in Handbook of Photosynthesis (Pessarakli, M., ed.), in press, M. Dekker, New York
4. Lichtenthaler, H.K. (1987) in Methods in Enzymology (Colowick, S.P., Kaplan, N.O., ed.) Vol. 148, pp. 350–382, Academic Press, San Diego–New York–Berkeley–Boston–London–Sydney–Toronto
5. Van Loven, K. (1995) PhD Thesis, Diepenbeek, Belgium