TY  - RPRT
TI  - ESCAPE FROM SD ASSOCIATED WITH FIXED-RATIO REINFORCEMENT.
AU  - D M THOMPSON
PY  - 1964
DO  - 10.1901/jeab.1964.7-1
UR  - https://pubmed.ncbi.nlm.nih.gov/14120132/
ID  - 14120132
ER  -