%0 Journal Article %A A. P. Nikol'skii %A E. A. Zhurakovskiy %T On the mechanism underlying the appearance of the $K_{\beta_5}$ line in the X-ray spectrum of $3d$-metals %J Doklady Akademii Nauk %D 1968 %P 313-316 %V 182 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1968_182_2_a21/ %G ru %F DAN_1968_182_2_a21