TY  - RPRT
TI  - Unsolved or unsolvable problems with diagnostic reference levels.
AU  - W Leitz
AU  - A Almén
PY  - 2005
DO  - 10.1093/rpd/nch504
UR  - https://pubmed.ncbi.nlm.nih.gov/15933104/
ID  - 15933104
ER  -