@article{UZMU_1959_186_186_a7,
     author = {L. A. Chudov},
     title = {Determining a~symmetric operator with defect indices $(1,1)$ by the spectra of two self-adjoint extensions},
     journal = {Uchenye Zapiski Moskovskogo Gosudarstvennogo Universiteta},
     pages = {137--139},
     year = {1959},
     volume = {186},
     number = {186},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/UZMU_1959_186_186_a7/}
}