1. Knappe, J., Balschkowski, HP., Gröbner, P., Schmitt, T.: Eur. J. Biochem., 50, 253–263 (1974)
2. Rödel, W., Plaga, W., Frank, R., Knappe, J.: Eur. J. Biochem., 177, 153–158 (1988)
3. Knappe, J., Blaschkowski, H.P.: Methods Enzymol.,41B,508–518 (1975) (Review)
4. Lindmark, D.G., Paolella, P., Wood, N.P.: J. Biol. Chem., 244, 3605–3612 (1969)
5. Conradt, H., Hohmann-Berger, M., Hohmann, H.-P, Blaschkowski, H.P, Knappe, J.: Arch. Biochem. Biophys., 228, 133–142 (1984)