TY  - RPRT
TI  - [Endonasal, microscopically controlled frontal sinus surgery].
AU  - D Simmen
PY  - 1997
DO  - 10.1055/s-2007-997401
UR  - https://pubmed.ncbi.nlm.nih.gov/9213400/
ID  - 9213400
ER  -