TY  - RPRT
TI  - Impossible objects and the things we do first in vision.
AU  - R I Cowie
PY  - 1988
DO  - 10.1111/j.2044-8295.1988.tb02291.x
UR  - https://pubmed.ncbi.nlm.nih.gov/3167498/
ID  - 3167498
ER  -