TY  - RPRT
TI  - Schema discrimination without external reinforcement.
AU  - E M Edmonds
AU  - M R Mueller
PY  - 1967
DO  - 10.2466/pms.1967.24.2.436
UR  - https://pubmed.ncbi.nlm.nih.gov/6040214/
ID  - 6040214
ER  -