@article{DAN_1979_249_3_a6,
     author = {F. G. Maksudov and \`E. \`E. Pashaeva},
     title = {On a multiple expansion in eigenfunctions},
     journal = {Doklady Akademii Nauk},
     pages = {544--547},
     publisher = {mathdoc},
     volume = {249},
     number = {3},
     year = {1979},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1979_249_3_a6/}
}