@article{TM_2008_261_a17,
     author = {A. M. Savchuk},
     title = {A {Mapping} {Method} in {Inverse} {Sturm--Liouville} {Problems} with {Singular} {Potentials}},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {243--248},
     publisher = {mathdoc},
     volume = {261},
     year = {2008},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TM_2008_261_a17/}
}