1. G. A. Howard and C. A. Slater, Chemistry and Industry 495 (1957).
2. R. A. Bernahard, G. Assoc. Affic. Agric. Chemists49, No. 3, 915 (1957); R. Zh. khim. No. 6, 17671 (1958).
3. J. Janak and H. Gvrkal, Collection24, 1967 (1959).
4. A. Liberty and G. P. Cartoni, Vapour Phase Chromatography (Ed. by D. H. Desty) (Butterworths Scientific Publications, London, 1951) p. 281.
5. G. Eglinton, R. J. Hamilton, R. Hodges, and R. A. Raphael, Chemistry and Industry (1959) p. 955.