TY  - RPRT
TI  - Concurrent variable-ratio schedules: Implications for the generalized matching law.
AU  - J S Macdonall
PY  - 1988
DO  - 10.1901/jeab.1988.50-55
UR  - https://pubmed.ncbi.nlm.nih.gov/16812549/
ID  - 16812549
ER  -