1. Allaway, W.G., Osmond, C.B., Troughton, J.H.: Environmental regulation of growth, photosynthetic pathway and carbon isotope discrimination in plants capable of crassulacean acid metabolism. In: R.L. Bieleski, A.R. Ferguson, M.M. Cresswell, eds., Mechanisms of regulation of plant growth, Bulletin 12, pp. 195?202. Wellington: Royal Society of N.Z. 1974
2. Bender, M.M.: Variations in the 13C/12C ratios of plants in relation to the pathway of photosynthetic carbon dioxide fixation. Phytochemistry 10, 1239?1244 (1971)
3. Bender, M.M., Rouhani, I., Vines, H.M., Black, C.C., Jr.: 13C/12C ratio changes in crassulacean acid metabolism. Plant Physiol. 52, 427?430 (1973)
4. Deleens, E., Lerman, J.C., Nato, A., Moyse, A.: Carbon isotope discrimination by the carboxylating reactions in C3, C4, and CAM plants. In: M. Avron, ed., Proceedings of the Third International Congress on Photosynthesis, September 2?6, 1974, The Weizman Institute of Science (1974)
5. Kluge, M., Fischer, K.: �ber Zusammenh�nge zwischen dem CO2-Austausch und der Abgabe von Wasserdampf durch Bryophyllum diagremontianum Berg. Plant (Berl.) 77, 212?223 (1967)