TY  - RPRT
TI  - When does grouping happen?
AU  - Stephen E Palmer
AU  - Joseph L Brooks
AU  - Rolf Nelson
PY  - 2003
DO  - 10.1016/j.actpsy.2003.06.003
UR  - https://pubmed.ncbi.nlm.nih.gov/14670702/
ID  - 14670702
ER  -