@article{ZNSL_2011_393_a2,
     author = {V. M. Babich and A. I. Popov},
     title = {Asymptotic solution of {Hamilton--Jacobi} equation concentrated near surface},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {23--28},
     publisher = {mathdoc},
     volume = {393},
     year = {2011},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2011_393_a2/}
}