References
- Arnold , Z. 1961 . Coll. Czech. Chem. Comm. , 26 : 3055
- Price , C. and Zomlefer , J. 1949 . J. Org. Chem. , J4 : 210
- Coppola , G. M. 1974 . J. Jeterocycl. Chem. , 11 ( 1 ) : 51 – 6 .
- Uhlmann , E. and Pfleiderer , W. 1981 . Helv. Chim. Acta , 64 : 1688
- Reese , C. B. and Zard , L. 1981 . Nucleic Acids Res. , : 4611