@article{RM_2019_74_5_a9,
     author = {V. V. Kozlov},
     title = {Linear systems with quadratic integral and complete integrability of the {Schr\"odinger} equation},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {959--961},
     publisher = {mathdoc},
     volume = {74},
     number = {5},
     year = {2019},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_2019_74_5_a9/}
}