1. R. Horgan and I.M. Scott, Cytokinins, in L. Rivier and A. Crozier, editors, The Principles and Practice of Plant Hormone Analysis, Vol.2, Academic Press, London, 1987, pp. 303–365.
2. E.W. Weiler, Planta, 149 (1980) 155.
3. G. Barthe and I. Stewart, J. Agric. Food Chem., 33 (1985) 293.
4. M. Strnad, W.Peters, E.Beck and M.Kamı́nek, Plant Physiol., 99 (1992) 74.
5. I. Macáčková, J. Krekule, J. Eder, F. Seidlová and M. Strnad, Physiol. Plantarum, 87 (1993) 160.