(PDF document) Volatile organic compounds in breath as markers of lung cancer: a cross-sectional study.
Phillips M, Gleeson K, Hughes JMB, Greenberg J, Cataneo RN, Baker L and McVay WP
Lancet (1999); 353: 1930-33. Commentary Lancet (1999); 353: 1897-1898

(PDF document) Variation in volatile organic compounds in the breath of normal humans.
Phillips M, Herrera J, Krishnan S, Zain M, Greenberg J and Cataneo RN
Journal of Chromatography. Biomedical Applications (1999); 729: 75-88