@article{ZNSL_1994_210_a8,
     author = {N. Ya. Kirpichnikova and M. M. Popov},
     title = {Computation of the second term of the ray method series in two and a~half dimension},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {94--108},
     publisher = {mathdoc},
     volume = {210},
     year = {1994},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1994_210_a8/}
}