TY  - RPRT
TI  - Human performance on conjunctive fixed-interval fixed-ratio schedules.
AU  - J D Duvinsky
AU  - R Poppen
PY  - 1982
DO  - 10.1901/jeab.1982.37-243
UR  - https://pubmed.ncbi.nlm.nih.gov/16812267/
ID  - 16812267
ER  -