@article{RM_2020_75_3_a3,
     author = {V. P. Palamodov},
     title = {On inversion of the {Lagrange--Dirichlet} theorem and instability of conservative systems},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {495--508},
     publisher = {mathdoc},
     volume = {75},
     number = {3},
     year = {2020},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_2020_75_3_a3/}
}