@article{ZNSL_1969_15_a9,
     author = {M. F. Pyshkina},
     title = {Asymptotic of eigen functions of {Helmholz} equation concentrated in a~neighbourhood of closed geodesical line},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {154--160},
     publisher = {mathdoc},
     volume = {15},
     year = {1969},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1969_15_a9/}
}