1. and Conformational Analysis, pp. 187-188. Interscience, New York (1965).
2. Unequivocal stereochemical assignment by mass spectrometry
3. and Tetrahedron Lett. 1829 (1971).
4. Excellent and recent reviews include in Stereochemistry, ed. by and Vol. 9, p. 35. Wiley, New York (1976);