1. Bovet-Nitti, F.: Action of nicotine on conditioned behaviour in naive and pretrained rats. In U. S. von Euler (Ed.): Tobacco Alkaloids and Related Com pounds. Oxford: Pergamon Press 1965.
2. Gatti, G. L.: Caratteristiche psicofarmacologiche di alcuni farmaci recentamente introdotti nella terapia delle malattie mentali. Tecnica della ?lever pressing avoidance?. Riv. sper. Freniat. 85, 496?503 (1961).
3. Geller, I.: Relative potencies of benzodiazepines as measured by their effects on conflict behaviour. Arch. int. Pharmacodyn. 149, 243?247 (1964).
4. ?, J. T. Kulak, and J. Seifter: The effect of chlordiazepoxide and chlorpromazine on a punishment discrimination. Psychopharmacologia (Berl.) 3, 274?385 (1962).
5. ?, and J. Seifter: Effects of meprobamate, barbiturates, d-amphetamine and promazine on experimentally induced conflict in the rat. Psychopharmacologia (Berl.) 1, 482?492 (1960).