TY  - RPRT
TI  - Preference for fixed-interval schedules: an alternative model.
AU  - M C Davison
AU  - W Temple
PY  - 1973
DO  - 10.1901/jeab.1973.20-393
UR  - https://pubmed.ncbi.nlm.nih.gov/16811713/
ID  - 16811713
ER  -