TY  - RPRT
TI  - Behavioral economics and within-session changes in responding.
AU  - F K McSweeney
AU  - S Swindell
PY  - 1999
DO  - 10.1901/jeab.1999.72-355
UR  - https://pubmed.ncbi.nlm.nih.gov/10605103/
ID  - 10605103
ER  -