1. W. H. Sebrell jr. andR. S. Harris (Eds.),The Vitamins, 2nd edn. (Academic Press, New York and London 1967 ff.), vol. 1–5.
2. R. Tschesche, F. Reiff, F. v. Werder, W. Nübling, R. Strohecker, U. Schwieter, H. Gutmann, H. Mayer andO. Isler, inUllmanns Encyklopädie der technischen Chemie, 3rd edn. (Ed.W. Foerst; Urban & Schwarzenberg, München, Berlin and Wien 1967), vol. 18, p. 177.
3. R. S. Harris, K. V. Thimann, G. F. Marrian, D. J. Ingle, I. G. Wool andJ. A. Loraine (Eds.),Vitamins and Hormones, Advances in Research and Applications (Academic Press, New York and London 1943 ff.), vol. 1 ff., e.g. vol. 18 (1960) (Vitamins A and Carotene), vol. 20 (1962) (Vitamins E), vol. 22 (1964) (Vitamin B6), vol. 24 (1966) (Vitamins K and Related Quinones), vol. 26 (1968) (Vitamin-Related Anemias).
4. A. F. Wagner andK. Folkers,Vitamins and Coenzymes (Interscience Publ., New York 1964).
5. G. Brubacher, W. Hausheer, O. Wiss andG. Huschke, inHandbuch der Lebensmittelchemie (Ed.J. Schormüller; Springer-Verlag, Berlin, Heidelberg and New York 1965), vol. 1, p. 933.