@article{ZNSL_1976_62_a10,
     author = {A. P. Kiselev},
     title = {Electromagnetic field in a neighborhood of a focus},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {126--136},
     year = {1976},
     volume = {62},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1976_62_a10/}
}