TY  - RPRT
TI  - Evidence against a constant-difference effect in concurrent-chains schedules.
AU  - James E Mazur
PY  - 2002
DO  - 10.1901/jeab.2002.77-147
UR  - https://pubmed.ncbi.nlm.nih.gov/11936248/
ID  - 11936248
ER  -