TY  - RPRT
TI  - Stimulus functions in chained fixed-interval schedules.
AU  - R T KELLEHER
AU  - W T FRY
PY  - 1962
DO  - 10.1901/jeab.1962.5-167
UR  - https://pubmed.ncbi.nlm.nih.gov/14454920/
ID  - 14454920
ER  -