@article{DE_1971_7_8_a14,
     author = {E. I. Moiseev},
     title = {A mean value formula for the eigenfunctions of a second order elliptic selfadjoint operator},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1490--1502},
     publisher = {mathdoc},
     volume = {7},
     number = {8},
     year = {1971},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1971_7_8_a14/}
}