@article{RM_2013_68_1_a1,
     author = {A. G. Baskakov},
     title = {Analysis of linear differential equations by methods of the spectral theory of difference operators and linear relations},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {69--116},
     publisher = {mathdoc},
     volume = {68},
     number = {1},
     year = {2013},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_2013_68_1_a1/}
}