1. Y. Sawwa and R. Maeda, J. Pharm. Soc. Jpn., 76, 301 (1956); Chem. Abstr., 50, 13875 (1956).
2. I. K. Moiseev, M. N. Zemtsova, and N. V. Makarova, Khim. Geterotsikl. Soedin., 876 (1994).
3. R. Elderfield (editor), Heterocyclic Compounds [Russian translation], Vol. 6, Inostr. Lit. Publishing House, Moscow (1960), p. 402.
4. N. N. Mel’nikov, The Chemistry and Technology of Pesticides [in Russian], Khimiya, Moscow (1974), p. 629.
5. L. A. Khachatryan, Dissertations of Candidates in Chemical Sciences, Yerevan (1983).