References
- Smith , J. G. and Ho , I. 1972 . J. Org. Chem. , 37 : 653
- Khan , N. H. , Zaberi , R. H. and Siddigui , A. A. 1980 . Synthetic Comm. , 10 : 363
- Thies , H. , Schonenberger , H. and Bauer , K. H. 1958 . Archiv Pharm. , 291 : 373
- Without filter aid, the zinc particles block the filter paper