1. F. Sicuteri, Pharmac. Res. Commun.3, 4 (1971).
2. F. Sicuteri, B. Anselmi and P. L. Del Bianco, Psychopharmacologia, Berl.29, 347 (1973).
3. J. M. Sneddon and P. Turner, J. Physiol., Lond.1189, 20 (1967).
4. P. Turner, Drugs and the special senses, Seminars in drug treatment.1, 335 (1971).
5. P. Galli, M. Fanciullacci, G. Monetti and E. Assenza, Boll. Soc. ital. Biol. sper.52 1948 (1976).