%0 Journal Article %A V. V. Beloshitskii %A M. A. Kumakhov %T Multiple scattering of channelled ions in crystal. Planar channelling %J Doklady Akademii Nauk %D 1973 %P 846-849 %V 212 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1973_212_4_a18/ %G ru %F DAN_1973_212_4_a18