Citation: Ui. Rustamova et Nk. Rustamov, EXTRACTION-PHOTOMETRIC DETERMINATION OF C OPPER(II) WITH CARBOXY-4-HYDROXYPHENYLAZO)-2',4'-DINITROPHENYLENE AND TRIISOBUTYL PHOSPHATE, Izvestia vyssih ucebnyh zavedenij. Himia i himiceskaa tehnologia, 38(3), 1995, pp. 40-44