1. A method for proline and hydroxyproline determination by means of ninhydrin reaction in acid medium after starch chromatography;Alexeenko;Dokl. Akad. Nauk SSSR,1960
2. Urinary hydroxyproline: creatinine ratio of normal humans at various ages;Allison;Clin. Chim. Acta,1966
3. Urinary excretion of hydroxyproline in kwashiorkor;Anasuya;Indian J. Med. Res.,1966
4. Total urinary hydroxyproline excretion in normal human subjects;Anderson;Clin. Sci.,1965
5. Connective tissue of meat. II. Determination of hydroxyproline;Baker;J. Sci. Food Agr.,1953