1. W. Witanowski, L. Stefaniak, and C. A. Webb, Annual Reports on NMR Spectroscopy, Vol. 11B, London, New York (1981), pp. 155, 379.
2. A. I. Artemenko, E. K. Anufriev, I. V. Tikunova, and O. Éksner, Zh. Prikl. Spektrosk.,33, No. 1, 131 (1980).
3. W. Arnaudov, L. Shishkova, A. Dobrev, and C. Ivanov, Spectrochim. Acta,33A, 437 (1977).
4. J. G. Kirchner, Thin Layer Chromatography, 2nd ed., Wiley, New York (1978).
5. J. H. Bowie, M. T. W. Hearn, and A. D. Wara, Austr. J. Chem.,22, No. 1, 175 (1969).