@article{ZNSL_1995_227_a3,
     author = {A. I. Vinogradov},
     title = {Convolutions. {Comparison} of spectral expansions at different vertices},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {23--40},
     publisher = {mathdoc},
     volume = {227},
     year = {1995},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1995_227_a3/}
}