1. A. A. Anderson, Gas Chromatography of Amino Compounds [in Russian], Zinatne, Riga (1982), p. 142.
2. A. L. Brown and K. R. Buck, Chem. Ind., p. 714 (1961).
3. W. E. Golding and C. A. Townsend, Chem. Ind., p. 1476 (1960).
4. H. A. Lloyd, H. M. Fales, and P. F. Highet, J. Am. Chem. Soc.,82, 3791 (1960).
5. W. E. Link, R. A. Morrisette, A. D. Copper, and C. F. Smullin, J. Am. Oil Chem. Soc.,37, 364 (1960).