@article{ZNSL_1980_99_a3,
     author = {A. P. Kiselev},
     title = {High-frequency point sources in an inhomogeneous elastic medium},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {28--42},
     publisher = {mathdoc},
     volume = {99},
     year = {1980},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1980_99_a3/}
}