1. (1) Colowick, S. P., Kaplan, N. O. and Ciotti, M. M.: The reaction of pyridine nucleotide with cyanide and its analytical use. J. Biol. Ch., 191, 447-459 (1951)
2. (2) Dorfman, A., Koser, S. A. and Saunders, F.: The activity of certain nicotinic acid derivatives as growth essential for the dysentery baciluls. J. Amer. Ch. S., 60, 2004-2005 (1938)
3. (3) Fukumi, H., Omura, K. and Sunagawa, S.: Studies on growth factor I. On the growth factor activity of alkyl-jodid of niacinamide. Igaku to Seibutsugaku, 12, 285-288 (1948) (in Japanese)
4. (4) Karrer, P., Schwarzenbach, G., Benz, F. and Solmssen, U.: Über Reduktionsprodukte des Nicotinsäure-amid-jodmethylates. Helv. chim. Acta, 19, 811-828 (1936)
5. (5) Karrer, P., Ringier, B. H., Buchi, J., Fritzsche, H. and Solmssen, U.: Modelversuche betreffend die wasserstoffübertragenden Wirkungsgruppen der Cofermente. Helv. chim. Acta, 20, 55-71 (1937)