1. , in ‘ Heterocyclic Compounds’, Ed. R. C. Elderfield, Wiley, New York, 1962, Vol. 7, p. 462 ;
2. 1, 2, 4-Oxadiazoles
3. in ‘Comprehensive Heterocyclic Chemistry’, Eds. A. R. Katritzky, C. W. Rees, Pergamon, Oxford, 1984, Vol. 4, p. 365.
4. , in ‘Comprehensive Heterocyclic Chemistry II’, Eds. A. R. Katritzky, C. W. Rees, E. V. F. Scriven, Pergamon, Oxford, 1996, Vol. 4, p. 179;