%0 Journal Article %A N. A. Toropov %A Yu. P. Udalov %A G. A. Genkin %T The role of the impurity cation in the process of selective etching of $\mathrm{KBr}$ and $\mathrm{NaCl}$ crystals %J Doklady Akademii Nauk %D 1964 %P 335-337 %V 158 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1964_158_2_a21/ %G ru %F DAN_1964_158_2_a21