%0 Journal Article %A I. Panin %A C. Walter %T Quaternionic Grassmannians and Borel classes in algebraic geometry %J Algebra i analiz %D 2021 %P 136-193 %V 33 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/AA_2021_33_1_a6/ %G en %F AA_2021_33_1_a6