1. D. H. R. Barton undR. C. Cookson, Quart. Rev.10, 44 (1956); dort weitere Literaturangaben.
2. W. G. Dauben undK. S. Pitzer inSteric Effects in Organic Chemistry (M. S. Newman, John Wiley & Sons, New York 1956).
3. W. Klyne,Progress in Stereochemistry (Butterworth, London 1954).
4. J. C. Mc Coubrey undA. R. Ubbelohde, Quart. Rev.5, 36 (1951).
5. E. A. Braude undF. C. Nachod,Determination of Organic Structures by Physical Methods (Academic Press, New York 1955).