1. Methoden der Organischen Chemie, “Houben-Weyl” 4. edit. (ed. E. Müller), vol. VIc, part 1 and 2 (1976) Stuttgart, G. Thieme Verlag (cited later on only “Houben-Weyl”)
2. The Chemistry of the Hydroxyl group, part 1 and 2, ed. S. Patai, Interscience Publ., London, New York, Sidney, Toronto 1971
3. Bartlett, P. D., Roha, M., Stiles, R. M.: J. Am. Chem. Soc. 76, 2349 (1954)
4. see also Hennion, G. F., Anderson, G. J.: ibid. 68, 424 (1946)
5. Swanholm, U., Parker, V. D.: J. Chem. Soc. Perkin I, 1973, 562