@article{DAN_1975_223_2_a19,
     author = {E. I. Galperin},
     title = {Polar-positional correlation of seismic waves},
     journal = {Doklady Akademii Nauk},
     pages = {336--338},
     publisher = {mathdoc},
     volume = {223},
     number = {2},
     year = {1975},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1975_223_2_a19/}
}