TY  - RPRT
TI  - Maintenance of avoidance behavior by unavoidable shocks.
AU  - M SIDMAN
AU  - R J HERRNSTEIN
AU  - D G CONRAD
PY  - 1957
DO  - 10.1037/h0043500
UR  - https://pubmed.ncbi.nlm.nih.gov/13502495/
ID  - 13502495
ER  -