References
- Heistad , G. T. 1958 . Effects of chlorpromazine and electroconvulsive shock on a conditioned emotional response . J. Comp. & Physiol. Psychol. , 51 : 209 – 212 .
- Malmo , R. B. 1959 . Activation: A neurophysiological dimension . Psychol. Rev. , 66 : 367 – 386 .
- Sines , J. O. and Keefe , D. J. 1962 . The relationship between pharmacologically modified operant response rate and heart rate . J. Genet. Psychol. , 100 : 267 – 274 .