“MUTUAL COORDINATION OF SYSTEMS BASED ON POLYMERIC STRUCTURES OF RARE-EARTH METAL IONS AND RATIONALE FOR THE STUDIES MUTUAL COORDINATION OF SYSTEMS BASED ON POLYMERIC STRUCTURES OF RARE-EARTH METAL IONS AND RATIONALE FOR THE STUDIES” (2025) SOUTH KAZAKHSTAN SCIENCE HERALD, (2), pp. 17–22. doi:10.54251/2616-6429.2025.02.0003nu.