TY  - RPRT
TI  - Within-session changes in responding during concurrent variable interval variable ratio schedules.
AU  - F K. McSweeney
AU  - E S. Murphy
AU  - B P. Kowal
PY  - 2001
DO  - 10.1016/s0376-6357(01)00179-6
UR  - https://pubmed.ncbi.nlm.nih.gov/11483354/
ID  - 11483354
ER  -