1. Anisman, H., Waller, T. G.: Effects of inescapable shock on subsequent avoidance performance: role of response repertoire changes. Behav. Biol. 9, 331?335 (1973)
2. Calderazzo, Filho, L. S., Moschovakis, A., Izquierdo, I.: Effect of hippocampal lesions on rat shuttle responses in four different behavioral tests. Physiol. Behav. 19, 569?572 (1977)
3. Cappell, H.: An evaluation of tension models of alcohol consumption. In: Recent advances in alcohol and drug problems, R. J. Gibb�ns, Y. Israel, H. Kalant, R. E. Popham, W. Schmidt, and R. G. Smart, eds., vol. 2, pp. 177?209. New York: Wiley 1975
4. Cavalheiro, E. A., Calderazzo Filho, L. S., Schutz, R. A., Souza, D. O.: Efeito do treino numa situa��o de n�o pareamento e n�o contig�ncia numa ?shuttle-box? s�bre condicionamentos classico e instrumental de ratos na mesma ?shuttle-box?. Ci�ncia e Cult. (S�o Paulo) 29, 834?835 (1977)
5. Cavalheiro, E. A., Izquierdo, I.: Effect of hippocampal and neocortical spreading depression on rat shuttle behavior in four different experimental paradigms. Physiol. Behav. 18, 1011?1016 (1977)