1. Burton, K.: A study of the conditions and mechanism of the diphenylamine reaction for the colorimetric estimation of DNA. -Biochem. J.62: 316–325, 1956.
2. Čatský, J.: Water saturation and photosynthesis rate as related to leaf age in the wilting plant. - In:Slavík, B. (ed.): Water Stress in Plants. Pp. 203–209. Proc. Symp. Prague, 1963. Czeohosl. Acad. Sci. Praha 1965.
3. Gates, C. T.: Water deficits and growth of herbaceous plants. - In:Kozlowski, T. T. (ed.): Water Deficits and Plant Growth. Vol. II. Pp. 135–190. Acad. Press, New York-London 1968.
4. Kozlowski, T. T. (ed.): Water Deficits and Plant Growth. Vols. I, II, III, and IV. Acad. Press, New York-San Francisco-London 1968a, 1968b, 1972, 1976.
5. Letham, D. S.: A new cytokinin bioassay and the naturally occurring cytokinins complex. - In:Wightmann, F., Setterfield, G. (ed.): Biochemistry and Physiology of Plant Growth Substances. Pp. 19–32. The Runge Press, Ottawa 1967.