1. Aronson, J. N., Tillinghast, J.: In: Spore research 1976. Barker, A. N., Wolf, L. J., Ellar, D. J., Dring, G. J., Gould, G. W. (eds.), Vol. I, pp. 351–357. London, New York: Academic Press 1977
2. Bazua, C. D., Wilke, C. R.: Biotechnol. Bioeng. Symp. 7, 105–118 (1977)
3. Bell, J. V.: J. Invertebr. Pathol. 26, 129–130 (1975)
4. Benz, G.: Experientia 31, 1288–1290 (1975)
5. Bernardini, M., Carilli, A., Pacioni, G., Santurbano, B.: Phytochemistry 14, 1865 (1975)