%0 Journal Article %A V. V. Nesterov %T Extraction of small rank unipotent elements in $\mathrm{SO}(2\ell,K)$ %J Zapiski Nauchnykh Seminarov POMI %D 2023 %P 101-112 %V 522 %I mathdoc %U http://geodesic.mathdoc.fr/item/ZNSL_2023_522_a5/ %G ru %F ZNSL_2023_522_a5