@article{UFA_2020_12_4_a1,
     author = {N. F. Valeev and Y. Sh. Ilyasov},
     title = {Inverse spectral problem for {Sturm--Liouville} operator with   prescribed partial trace},
     journal = {Ufa mathematical journal},
     pages = {19--29},
     publisher = {mathdoc},
     volume = {12},
     number = {4},
     year = {2020},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/UFA_2020_12_4_a1/}
}