TY  - RPRT
TI  - EVOKED RESPONSES TO NUMERICAL AND NON-NUMERICAL VISUAL STIMULI WHILE PROBLEM SOLVING.
AU  - R M CHAPMAN
AU  - H R BRAGDON
PY  - 1964
DO  - 10.1038/2031155a0
UR  - https://pubmed.ncbi.nlm.nih.gov/14213667/
ID  - 14213667
ER  -