TY  - RPRT
TI  - Spatial visualization: running visualization for empty squares.
AU  - J R Beech
PY  - 1997
DO  - 10.2466/pms.1997.85.3.1028
UR  - https://pubmed.ncbi.nlm.nih.gov/9399314/
ID  - 9399314
ER  -