1. Laitinen, H. A.: Anal. Chem. 47:1225 (1975).
2. Wehry, E. L.: Anal. Chem. 52:75R (1980).
3. McFadden, W.:Techniques of Combined Gas Chromatography/Mass Spectrometry: Applications in Organic Analysis, Wiley-Interscience, New York (1973).
4. Message, G. M.: Practical Aspects of Gas Chromatography/Mass Spectrometry, Wiley-Interscience, New York (1984).
5. Odham, G., Larsson, G., Mardh, P.-A.: Gas Chromatography/Mass Spectrometry: Applications in Microbiology, Plenum Press, New York (1984).