1. M. R. Grimmett, in: O. Meth-Cohn and A. R. Katritzky (editors), Best Synthetic Methods, Academic Press, London, San Diego (1997).
2. L. M. Junker and J. Clardy, Antimicrob. Agents Chemother., 51, 3582 (2007).
3. L. N. Grigor’eva, S. A. Amitina, and L. B. Volodarskii, Khim. Geterotsikl. Soedin., 1387 (1983). [Chem. Heterocycl. Comp., 19, 1104 (1983)].
4. M. R. Grimmett, in: A. R. Katritzky and C. W. Rees (editors), Comprehensive Heterocyclic Chemistry. The Structure, Reactions, Synthesis, and Uses of Heterocyclic Compounds, Vol. 5, Pergamon Press, Oxford, New York, Toronto, Sydney, Paris, Frankfurt (1984), p. 405.
5. L. N. Grigor’eva, A. Ya. Tikhonov, S. A. Amitina, L. B. Volodarskii, and I. K. Korobeinicheva, Khim. Geterotsikl. Soedin., 331 (1986). [Chem. Heterocycl. Comp., 22, 268 (1986)].