@article{FPM_2004_10_1_a5,
     author = {A. S. Ivanova},
     title = {Electromagnetic waves that admit translations along the null vector},
     journal = {Fundamentalʹna\^a i prikladna\^a matematika},
     pages = {49--56},
     publisher = {mathdoc},
     volume = {10},
     number = {1},
     year = {2004},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FPM_2004_10_1_a5/}
}