1. S. P. Rose and R. Smith, New Sci.43, 468 (1969).
2. G. R. N. Jones, Nature (London)235, 257 (1972).
3. V. I. Dimitriev, Voen-Med. Zh. (I)88 (1974), Chem. Abstr.81, 371 u (1974).
4. J. R. Tigner and J. F. Besser, J. Agr. Food Chem.10, 484 (1962).
5. W. L. Berry, Jr., D. P. Nisonger, and P. S. Craig, U. S. Patent 3715379 (Feb. 6,1973).