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2. a;Tapscott;Chem Chem Rev Chem,1976
3. Pure and Applied;Sharpless;Chem,1983
4. Aidrichimica;Sharpless;Acta,1979
5. We do not discuss here the peroxymetallation mechanism proposed by Mimoun though it is not be excluded by the kinetic data;Mimoun;Mol Catal,1980