@article{TMF_1975_22_2_a8,
     author = {M. N. Adamyan},
     title = {On perturbations of the potential in the radial {Dirac} equation leading to multiplication of the spectral density by a~polynomial},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {236--243},
     publisher = {mathdoc},
     volume = {22},
     number = {2},
     year = {1975},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1975_22_2_a8/}
}