TY  - RPRT
TI  - Treating problem behaviors maintained by negative reinforcement.
AU  - E Cipani
AU  - F Spooner
DO  - 10.1016/s0891-4222(97)00014-0
UR  - https://pubmed.ncbi.nlm.nih.gov/9292928/
ID  - 9292928
ER  -