1. Arnon, D.I. 1949. Copper enzymes in isolated chloroplasts. Polyphenol oxidase inBeta vulgaris. Plant Physiol.24: 1–15.
2. Ĉatský, J., I. Tichá andJ. Solárová. 1976. Ontogenetic changes in the internal limitations to bean-leaf photosynthesis 1. Carbon dioxide exchange and conductances for carbon dioxide transfer. Photosynthetica10: 394–402.
3. Chabot, B.F. andD.J. Hicks. 1982. The ecology of leaf life spans. Ann. Rev. Ecol. Syst.13: 229–259.
4. Constable, G.A. andH.M. Rawson. 1980. Effect of leaf position, expansion and age on photosynthesis, translocation and water use efficiency of cotton. Aust. J. Plant Physiol.7: 89–100.
5. Dale, J.E. 1982. The Growth of Leaves: Studies in Biology137. Edward Arnold, London.