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- [7] MICROBIOLOGICAL SYNTHESIS OF VITAMIN-B12 BY PROPIONIC ACID BACTERIA INDUSTRIAL AND ENGINEERING CHEMISTRY, 1952, 44 (11): : 2651 - 2655
- [10] VITAMIN-B12 CONTENT IN COMPLEX STOMACH OF SMALL RUMINANTS RECEIVING PROPIONIC-ACID AND SODIUM PROPIONATE IN FOOD AGRESSOLOGIE, 1975, 16 : 37 - 41