%0 Journal Article %A B. S. Kashin %T Decomposing an orthogonal matrix into two submatrices with extremally small $(2,1)$-norm %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 2017 %P 971-973 %V 72 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/RM_2017_72_5_a8/ %G en %F RM_2017_72_5_a8