@article{ZNSL_1992_203_a2,
     author = {V. M. Babich},
     title = {The construction of {Gaussian} beams satisfying to the wave equation with exponential exactness},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {17--20},
     publisher = {mathdoc},
     volume = {203},
     year = {1992},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1992_203_a2/}
}