1. D. R. Threllfall and W. T. Griffiths, in “Biochemistry of Chloroplasts,” ed. by T. W. Goodwin, vol. 2, Academic Press, London, 1967, p. 373.
2. T. W. Goodwin, in “Biosynthetic Pathways in Higher Plants,” ed. by J. B. Pridham and T. Swain, Academic Press, New York, 1965, p. 57.