Blakley, R.L. Cobamides and ribonucleotide reduction. I.(1965).“Cobamide stimulation of ribonucleotide reduction in extracts of Lactobacillus leichmannii.”.J. Biol. Chem.240: 2173-2180.
Goulian, M. and Beck, W.S.(1966).“Purification and properties of cobamide-dependent ribonucleotide reductase from Lactobacillus leichmannii.”.J. Biol. Chem.241: 4233-4242.PMID5924645.
Lammers, M. and Follmann, H.(1983).“The ribonucleotide reductases - a unique group of metalloenzymes essential for cell-proliferation.”.Struct. Bonding54: 27-91.