@article{DAN_1984_274_1_a7,
     author = {V. Ya. Yakubov},
     title = {Estimates for elliptic operator eigenfunctions normalized in $L_2$},
     journal = {Doklady Akademii Nauk},
     pages = {35--37},
     publisher = {mathdoc},
     volume = {274},
     number = {1},
     year = {1984},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1984_274_1_a7/}
}