1. For reviews see A. R. Battersby and E. McDonald in “Vitamin B121”, ed. D. Dolphin, Wiley, New York, p. 107 (1982).
2. A. R. Battersby, Biosynthesis of Vitamin B12. Accs. Chem. Res., 19, 147 (1986).
3. A. R Battersby, Synthetic and Biosynthetic Studies on Vitamin B12. J. Nat Prod., 51, 643 (1988).
4. A. R Battersby, C. J. R Fookes, G. W. J. Matcham and E. McDonald, Biosynthesis of the Pigments of Life: Formation of the Macrocycle, Nature, 285, 17, (1980).
5. A. R Battersby, E. Hunt and E. McDonald, Biosynthesis of Type-III Porphyrins: Nature of the Rearrangement Process, J. Chem. Soc., Chem. Commun., 442 (1973).