SYNTHESIS, ELECTRONIC STRUCTURE, AND ABSORPTION SPECTRA OF 9-HYDROXYPYRIDO[1,2-A]-PYRIMIDINIUM DERIVATIVES ArticleZaitsev B.E., Gashev S.B., Nikitin S.V., Smirnov L.D., Koval'chukova O.V., Leon Palomino M.I.Chemistry of Heterocyclic Compounds. Том 27. 1991. С. 1110-1115
SYNTHESIS, ELECTRONIC-STRUCTURE AND ABSORPTION-SPECTRA OF 9-HYDROXYPYRIDO[1,2-A]PYRIMIDINIUM DERIVATIVES ArticlePALOMINO M.IL., ZAITSEV B.E., GASHEV S.B., NIKITIN S.V., SMIRNOV L.D., KOVALCHUKOVA O.V.Chemistry of Heterocyclic Compounds / KHIMIYA GETEROTSIKLICHESKIKH SOEDINENII. 1991. С. 1381-1387
SYNTHESIS AND SPECTROCHEMISTRY OF METAL-COMPLEXES WITH 2,4-DIMETHYL-9-HYDROXYPYRIDO[1,2-A]PYRIMIDINIUM PERCHLORATE ArticlePALOMINO M.IL., ZAITSEV B.E., GRIDASOVA R.K., GASHEV S.B., DOLGANEV V.P., NIKITIN S.V., SMIRNOV L.A.ZHURNAL NEORGANICHESKOI KHIMII / Russian Journal of Inorganic Chemistry. Том 35. 1990. С. 2024-2033