1. Punishment training in the intact cockroach, Periplaneta americana;Disterhoft,1971
2. “P-R” differences in intact cockroaches as a function of testing interval;Disterhoft;Psychonom. Sci.,1968
3. Learning in an isolated prothoracic insect ganglion;Eisenstein;Anim. Behav.,1965
4. Learning of leg position by the ventral nerve cord in headless insects;Horridge,1962
5. Neurophysiological studies of “learning” in headless insects;Hoyle,1965