%0 Journal Article %A V. I. Yanchevskiǐ %T Henselian division algebras and reduced unitary Whitehead groups for outer forms of~anisotropic algebraic groups of the type $A_n$ %J Sbornik. Mathematics %D 2022 %P 1096-1156 %V 213 %N 8 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_2022_213_8_a3/ %G en %F SM_2022_213_8_a3