1. Ottenstein, D. M., J. Gas Chromatog.1 (1963) 11.
2. Janak, J., “Gas Chromatography1962”, Ed. M. van Swaay, Butterworths, London 1962, p. 58.
3. Janak, J. andR. Staszewski, J. Gas Chromatog.2 (1964) 47.
4. Bens, E. M. andC. M. Drew, 7th International Symposium of Gas Chromatography and its Exploitation, Copenhagen, June 1968