@article{ZNSL_1987_165_a5,
     author = {N. S. Grigor'eva},
     title = {Short-wavelength asymptotic solution of the problem of a moving point source in a time-dependent inhomogeneous medium},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {42--51},
     year = {1987},
     volume = {165},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1987_165_a5/}
}