@article{ZNSL_1985_147_a12,
     author = {A. V. Sobolev and D. R. Yafaev},
     title = {Phase analysis in the problem of scattering by a radial potential},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {155--178},
     publisher = {mathdoc},
     volume = {147},
     year = {1985},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1985_147_a12/}
}