MATEKEYEVA, A.; MUXAMMADIYEVA, M.; SAITQULOVA, V.; RUZMETOV, U. DEVELOPMENT OF A HYBRID SORPTION–SPECTROSCOPIC SYSTEM BASED ON NITROSO-N-SALT IMMOBILIZED ON SILK FIBROIN FOR THE DETERMINATION OF Co(II) IONS. NUUz 2026, 3, 327-330.