TY  - RPRT
TI  - Yoked variable-ratio and variable-interval responding in pigeons.
AU  - A C Catania
AU  - T J Matthews
AU  - P J Silverman
AU  - R Yohalem
PY  - 1977
DO  - 10.1901/jeab.1977.28-155
UR  - https://pubmed.ncbi.nlm.nih.gov/16812022/
ID  - 16812022
ER  -