@article{TRSPY_2008_260_a15,
     author = {A. M. Savchuk and A. A. Shkalikov},
     title = {On the {Properties} of {Maps} {Connected} with {Inverse} {Sturm--Liouville} {Problems}},
     journal = {Informatics and Automation},
     pages = {227--247},
     publisher = {mathdoc},
     volume = {260},
     year = {2008},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TRSPY_2008_260_a15/}
}