TY  - RPRT
TI  - Drug discrimination under two concurrent fixed-interval fixed-interval schedules.
AU  - D E McMillan
AU  - M Li
PY  - 2000
DO  - 10.1901/jeab.2000.74-55
UR  - https://pubmed.ncbi.nlm.nih.gov/10966096/
ID  - 10966096
ER  -