Hausmann E (Apr 1967). "Cofactor requirements for the enzymatic hydroxylation of lysine in a polypeptide precursor of collagen". Biochimica et Biophysica Acta (BBA) - Protein Structure. 133 (3): 591–3. doi:10.1016/0005-2795(67)90566-1. PMID6033801.
Hausmann E (Apr 1967). "Cofactor requirements for the enzymatic hydroxylation of lysine in a polypeptide precursor of collagen". Biochimica et Biophysica Acta (BBA) - Protein Structure. 133 (3): 591–3. doi:10.1016/0005-2795(67)90566-1. PMID6033801.