TY  - RPRT
TI  - Fixed-ratio punishment.
AU  - N H AZRIN
AU  - W C HOLZ
AU  - D F HAKE
PY  - 1963
DO  - 10.1901/jeab.1963.6-141
UR  - https://pubmed.ncbi.nlm.nih.gov/13965779/
ID  - 13965779
ER  -