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2. J. H. Purnell, C. P. Quinn “Gas Chromatography 1960”, ed.R. P. W. Scott, Butterworths, 1960, p. 184.
3. R. Kieselbach, “Gas Chromatography”, ed.N. Brenner, J. E. Callen, M. D. Weiss, Academic Press, 1962, p. 139.
4. D. H. Desty, A. Goldup, “Gas Chromatography 1960”, ed.R. P. W. Scott, Butterworths, 1960, p. 162.
5. D. H. Desty, A. Goldup, W. T. Swanton, “Gas Chromatography”, ed.N. Brenner, J. E. Callen, M. D. Weiss, Academic Press, 1962, p. 105.