TY  - RPRT
TI  - A procedure for generating differential "sample" responding without different exteroceptive stimuli.
AU  - Karen M Lionello-DeNolf
AU  - Peter J Urcuioli
PY  - 2003
DO  - 10.1901/jeab.2003.79-21
UR  - https://pubmed.ncbi.nlm.nih.gov/12696739/
ID  - 12696739
ER  -