SYNTHESIS AND IR SPECTROSCOPIC ANALYSIS OF Co(II), Ni(II) AND Cu(II) ION COMPLEXES WITH SULFANILAMIDE AND NICOTINAMIDE. Qo‘qon DPI. Ilmiy xabarlar jurnali, [S. l.], v. 8, n. 2, p. 223–232, 2026. DOI: 10.70728/a.series.v08.i02.031. Disponível em: https://journals-kokandsu.uz/index.php/kspi/article/view/300. Acesso em: 10 jun. 2026.