1. Tsanev, R., Symp. Biol. Hung., 3, 55 (1963).
2. Glinos, A. D., and Moore, M. O., J. Histochem. Cytochem., 4, 434 (1956).
3. Tsanev, R., and Markov, G. G., Folia Histochem. Cytochem., 2, 124 (1964).
4. Tsanev, R., Arch. Biochim. Cosmét., 42, 18 (1961).
5. Tashiro, Y., J. Biochem., Tokyo, 45, 937 (1958).