1. ARMITAGE, A. K., HALL, G. H. and HENEAGE, E., Br. J. Pharmac.36, 211 p. (1969).
2. BOWERY, T. G., GATTERDAM, P. E., GUTHRIE, F. E. and RABB, R. L., J. Agr. Food Chem.13, 356–359 (1965).
3. DOROUGH, H. W. and GIBSON, J. R., Environ. Entomol.1, 739–743 (1972).
4. EGLE, J. L., JR., J. Pharmac. Exp. Therapeutics,174, 14–19 (1970).
5. GUTHRIE, F. E., Beitr. Tabakforsch.1, 229–246 (1968).