TY  - RPRT
TI  - Comparing preference and resistance to change in constant- and variable-duration schedule components.
AU  - R C Grace
AU  - J A Nevin
PY  - 2000
DO  - 10.1901/jeab.2000.74-165
UR  - https://pubmed.ncbi.nlm.nih.gov/11029021/
ID  - 11029021
ER  -