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MANIFESTATION OF DIFFERENT TYPES OF TUNGSTEN COORDINATION POLYHEDRA IN EUROPIUM-ACTIVATED LNWO4CL AND LA3WO6CL3 VIBRATING SPECTRA СтатьяTSARYUK V.I., VENSKOVSKII N.U., ZOLIN V.F., MARKUSHEV V.M., NGASSAPA F.NB., TARAROV A.V., TUPOLEVA A.L.КООРДИНАЦИОННАЯ ХИМИЯ. Том 19. 1993. С. 844-848