@article{TM_2008_260_a15,
     author = {A. M. Savchuk and A. A. Shkalikov},
     title = {On the {Properties} of {Maps} {Connected} with {Inverse} {Sturm{\textendash}Liouville} {Problems}},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {227--247},
     year = {2008},
     volume = {260},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TM_2008_260_a15/}
}