TY  - RPRT
TI  - Optimality And Concurrent Variable-interval Variable-ratio Schedules.
AU  - W Baum
AU  - C Aparicio
PY  - 1999
DO  - 10.1901/jeab.1999.71-75
UR  - https://pubmed.ncbi.nlm.nih.gov/16812893/
ID  - 16812893
ER  -