References
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- Rao , C. B. , Rao , T. M. and Vijayakumar , E. K. S. 1979 . Indian J. Chem. , 18B : 513
- Burnell , R. H. , Jean , M. and Poirier , D. Synthetic Communications , Vol. 13 ( No.3 ) (in press)
- Brown , H. C. and Yoon , N. M. 1968 . J. Chem. Soc. Chem. Comm. , : 1549