V. M. Berezovskii, G. D. Glebova, “A new method of synthesizing allooxazines. Condensation of aromatic o-diamines with violuric acid and its thioanalogues”, Dokl. Akad. Nauk SSSR, 146:2 (1962), 355–358
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V. M. Berezovskii, G. D. Glebova, “A new reaction of o-phenylenediamines with violuric acid”, Dokl. Akad. Nauk SSSR, 143:6 (1962), 1341–1344
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