@article{SM_1970_10_4_a1,
     author = {V. A. Marchenko and K. V. Maslov},
     title = {Stability of the problem of recovering the {Sturm--Liouville} operator from the spectral function},
     journal = {Sbornik. Mathematics},
     pages = {475--502},
     publisher = {mathdoc},
     volume = {10},
     number = {4},
     year = {1970},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1970_10_4_a1/}
}