%0 Journal Article
%A V. V. Kozlov
%T Linear system of differential equations with a quadratic invariant as the Schr\"odinger equation
%J Doklady Rossijskoj akademii nauk. Matematika, informatika, processy upravleniâ
%D 2021
%P 48-52
%V 496
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DANMA_2021_496_a9/
%G ru
%F DANMA_2021_496_a9