TY  - RPRT
TI  - Establishing mirror-image discriminations with progressively delayed extra-stimulus prompts.
AU  - P M Smeets
AU  - G E Lancioni
AU  - S Striefel
PY  - 1991
DO  - 10.1016/0022-0965(91)90059-2
UR  - https://pubmed.ncbi.nlm.nih.gov/1774548/
ID  - 1774548
ER  -