TY  - RPRT
TI  - Colour and spatial performance.
AU  - H Widdel
AU  - C Pfendler
PY  - 1993
DO  - 10.2466/pms.1993.77.3f.1249
UR  - https://pubmed.ncbi.nlm.nih.gov/8170773/
ID  - 8170773
ER  -