TY  - RPRT
TI  - In search of the feedback function for variable-interval schedules.
AU  - W M Baum
PY  - 1992
DO  - 10.1901/jeab.1992.57-365
UR  - https://pubmed.ncbi.nlm.nih.gov/16812658/
ID  - 16812658
ER  -