TY  - RPRT
TI  - Concurrent responses during multiple schedules in rats.
AU  - I H Iversen
PY  - 1975
DO  - 10.1111/j.1467-9450.1975.tb00163.x
UR  - https://pubmed.ncbi.nlm.nih.gov/1138344/
ID  - 1138344
ER  -