TY  - RPRT
TI  - Concentrating breath samples using liquid nitrogen: a reliable method for the simultaneous determination of ethane and pentane.
AU  - M D Knutson
AU  - F E Viteri
PY  - 1996
DO  - 10.1006/abio.1996.0438
UR  - https://pubmed.ncbi.nlm.nih.gov/8923975/
ID  - 8923975
ER  -