1. Alvim, P. de T.: Net assimilation rate and growth behaviour of beans as affected by gibberellic acid, urea, and sugar sprays. Plant Physiol. 35, 285?288 (1960).
2. Andersson, G.: Gas exchange and frost hardening studies in winter cereals. Gleerupska. Lund: Univ. bokhand. 1944.
3. Asana, R. D., and C. M. Joseph: Studies in physiological analysis of yield. VII. Effect of temperature and light on the development of the grain of two wheat varieties. Indian J. Plant Physiol. 7, 86?101 (1964).
4. Bakhuyzen, H. L. Van der Sande: Bloei en bloeihormonen in het bijzonder bij tarwe. I. Minist. Landb. Verslag Onderz. 53, 145?212 (1947).
5. Bidwell, R. G. S., and W. B. Turner: Effect of growth regulators on CO2 assimilation in leaves, and its correlation with the bud break response in photosynthesis. Plant Physiol. 41, 267?270 (1966).