TY  - RPRT
TI  - Preference for fixed-interval schedules: effects of unequal initial links.
AU  - M C Davison
PY  - 1976
DO  - 10.1901/jeab.1976.25-371
UR  - https://pubmed.ncbi.nlm.nih.gov/16811921/
ID  - 16811921
ER  -