%0 Journal Article %A V. L. Ginzburg %A S. I. Syrovatsky %T The nature of discrete sources of X-rays %J Doklady Akademii Nauk %D 1964 %P 808-810 %V 158 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1964_158_4_a14/ %G ru %F DAN_1964_158_4_a14