@article{RM_2021_76_2_a3,
     author = {V. V. Kozlov},
     title = {Quantization of linear systems of differential equations with a quadratic invariant in a {Hilbert} space},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {357--359},
     publisher = {mathdoc},
     volume = {76},
     number = {2},
     year = {2021},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_2021_76_2_a3/}
}