@article{MZM_1967_2_3_a9,
     author = {V. B. Lidskii and B. V. Fedosov},
     title = {Convergence to zero of the solutions of a second-order differential equation with operator coefficients},
     journal = {Matemati\v{c}eskie zametki},
     pages = {307--314},
     publisher = {mathdoc},
     volume = {2},
     number = {3},
     year = {1967},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1967_2_3_a9/}
}