%0 Journal Article %A V. M. Dziomko %T Extraction with the participation of three chelatoformers %J Doklady Akademii Nauk %D 1960 %P 1091-1093 %V 134 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1960_134_5_a25/ %G ru %F DAN_1960_134_5_a25