TY  - RPRT
TI  - [The closed Landolt ring--a handy test for evaluating suspected simulation].
AU  - M Gräf
AU  - J Roesen
PY  - 2001
DO  - 10.1055/s-2001-16258
UR  - https://pubmed.ncbi.nlm.nih.gov/11488010/
ID  - 11488010
ER  -