@article{ZNSL_1990_186_a10,
     author = {A. P. Katchalov},
     title = {Space-time {Gaussian} beams of the electromagnetic waves},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {115--121},
     publisher = {mathdoc},
     volume = {186},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1990_186_a10/}
}