TY  - RPRT
TI  - A progression for generating variable-interval schedules.
AU  - M FLESHLER
AU  - H S HOFFMAN
PY  - 1962
DO  - 10.1901/jeab.1962.5-529
UR  - https://pubmed.ncbi.nlm.nih.gov/13945507/
ID  - 13945507
ER  -