@article{DANMA_2021_496_a9,
     author = {V. V. Kozlov},
     title = {Linear system of differential equations with a quadratic invariant as the {Schr\"odinger} equation},
     journal = {Doklady Rossijskoj akademii nauk. Matematika, informatika, processy upravleni\^a},
     pages = {48--52},
     publisher = {mathdoc},
     volume = {496},
     year = {2021},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DANMA_2021_496_a9/}
}