1. Stegman, H.: Mikrobestimmung von Hydroxyprolin mit Chloramin-T und p-DimethyIaminobenzaldehyd. Hoppe Seyler's Z. Physiol. Chem., 311, 41-45, 1958
2. Prockop, D. J., and Udenfriend, S.: A specific method for the analysis of hydroxyproline in tissues and urine. Anal. Biochem., 1, 228-239, 1960
3. Juva, K., and Prockop, D. J.: Modified procedure for the assay of H3- or C14-labeled hydroxyproline: A specific method for the analysis of hydroxyproline in tissues and urine. Anal. Biochem., 15, 77-83, 1966