8Kojima I, Sato H, Fujiwara Y. Vitamin B12 production by isopropanol-assimilating microorganisms[J].J Ferment Bioeng, 1993,75 (3) : 182-186.
9Inoue K, Kangeyama S, Morinaga T, et al. Vitamin B12 production by Acetobacterium sp. and its tetra-chloromethane-resistant mutants [J]. J Ferment Bioeng,1992,73(1).76-78.
10Vandamme EJ. Production of vitamins, coenzymes and related biochemicals by biotechnological process[J]. J Chem Technol Biotechnol , 1992, 53 (4) : 313-327.