1. Oncley, J.L.: Ann. N.Y. Acad. Sci. 41 (1941) 121.
2. Kratky, O., Pörod, G.: Recl. Trav. Chim. Pays-Bas 68 (1949) 1106.
3. Eigen, M., DeMaeyer, L.: Techniques of Organic Chemistry Vol. VIII/2, Weissberger, A. (ed.), New York: John Wiley 1963, p. 895.
4. Fresco, J.R., Klotz, L.C., Richards, E.G.: Cold Spring Harbor Symp. Quant. Biol. 28 (1963) 83.
5. Pohl, F.M.: Eur. J. Biochem. 4 (1968) 373.