@article{ZNSL_1983_128_a6,
     author = {A. P. Katchalov and M. M. Popov and I. Pshenchik},
     title = {On validity of {Gaussian} beams summation method in problems with corner points on boundaries},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {65--71},
     publisher = {mathdoc},
     volume = {128},
     year = {1983},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1983_128_a6/}
}