Stamford, N.P.J.; Crouzet, J.; Cameron, B.; Alanine, A.I.D.; Pitt, A.R.; Yeliseev, A.A.; Battersby, A.R.
Biosynthesis of vitamin B12: the preparative multi-enzyme synthesis of precorrin-3A and 20-methylsirohydrochlorin (a 2,7,20-trimethylisobacteriochlorin) (1996), Biochem. J., 313, 335-342.