COMPLEXES OF <I>D</I> AND <I>F</I>-METALS WITH 2-METHYL-3-HYDROXY(AMINO)PYRIDO[1,2-A]PYRIMIDINE-4-ONE. CRYSTAL STRUCTURE OF 2-METHYL-3-HYDROXYPYRIDO[1,2-A]PYRIMIDINE-4-ONE ArticleMordovina N.I., Koval'chukova O.V., Zaitsev B.E., Strashnova S.B., Leon Palomino M.I., Bel'skii V.K., Stash A.I., Nikitin S.V., Ryabov M.A.KOORDINATSIONNAYA KHIMIYA / Russian Journal of Coordination Chemistry. Том 29. 2003. С. 945-950