%0 Journal Article %A V. A. Izmailsky %A K. A. Nuridzhanyan %T Absorption spectra of 4-$\mathrm{NO}_2$-diphenylamine derivatives. The influence of electron-donor groups in the metaposition %J Doklady Akademii Nauk %D 1960 %P 594-597 %V 133 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1960_133_3_a25/ %G ru %F DAN_1960_133_3_a25