TY  - RPRT
TI  - Behavioral interaction under concurrent spaced-responding, variable-interval schedules of reinforcement.
AU  - E F SEGAL
PY  - 1961
DO  - 10.1901/jeab.1961.4-263
UR  - https://pubmed.ncbi.nlm.nih.gov/13749652/
ID  - 13749652
ER  -