@article{DE_1978_14_11_a12,
     author = {A. M. Pyzh'yanov},
     title = {Perturbation of the poles of the scattering operator for a system of {Maxwell} equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {2052--2059},
     publisher = {mathdoc},
     volume = {14},
     number = {11},
     year = {1978},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1978_14_11_a12/}
}