1Duffus C M,Rosie R,1973. Evidence for C4 photosynthesis in barley pericarp tissue Planta,114:219-226.
2Nutbeam A R,Duffus C M,1976.Biochemical and Biophysical Research Communication,70:1198-1203.
3Edwards G et a1,1983. In C3, C4: mechamisms, and cellular and entironmental regulation of photosynthesis. OxfordUK: Blackwell Scientific Publications, pp. 480-486.