@article{ZNSL_2003_297_a4,
     author = {A. P. Katchalov},
     title = {Gaussian beams, the {Hamilton{\textendash}Jacobi} equations and {Finsler} geometry},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {66--92},
     year = {2003},
     volume = {297},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2003_297_a4/}
}