KOLOSOV, M. A.; KULYK, O. G.; CHEPELIEVA, L. V.; ORLOV, V. D. Ethylation of 5-acetyl-5-methyl-7-phenyl-4,7-dihydro[1,2,4]triazolo[1,5-a]pyrimidine. Kharkiv University Bulletin. Chemical Series, n. 22, p. 39-44, 20 Dec. 2013.