@article{IVM_1991_12_a12,
     author = {V. A. Yurko},
     title = {An inverse problem for differential operators on the half-axis},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {67--76},
     publisher = {mathdoc},
     number = {12},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1991_12_a12/}
}