1. Ballard, L. A. T.: The depressant effect of CO2 upon photosynthesis. New Phytologist 40, 278?290 (1941).
2. Barrow, G. M.: Physical chemistry, p. 361?363. Tokyo: McGraw-Hill Book Co. Inc. and Kogakusha Co. Ltd. 1961.
3. Björkmann, O., Nobs, M. A., Hiesey, W. M.: Carnegie Institution Year Book. 68, 614?620 (1970).
4. Blackman, F. F.: Optima and limiting factors. Ann. bot. 19, 281?295 (1905).
5. Crozier, W. J.: On biological oxidation as function of temperature. J. gen. Physiol. 7, 189 (1925).