CRYSTAL AND MOLECULAR STRUCTURES OF 2,4-DIMETHYL-9-HYDROXYPYRIDO[1,2-A]PYRIMIDINIUM PERCHLORATE: ITS COMPLEXES WITH PRASEODYMIUM, NEODYMIUM, SAMARIUM, AND EUROPIUM Article Koval'Chukova O.V., Strashnova S.B., Zaitev B.E., Bel'Skii V.K., Stash A.I., Nikitin S.V., Goncharov O.V., Shchelokov R.N. Russian Journal of Coordination Chemistry/Koordinatsionnaya Khimiya. Vol. 26. 2000. P. 290-294
