@article{DAN_1974_215_3_a10,
     author = {Kh. Kh. Murtazin},
     title = {Estimates of solutions of {Helmholtz{\textquoteright}} equation and their application in spectral theory},
     journal = {Doklady Akademii Nauk},
     pages = {539--542},
     publisher = {mathdoc},
     volume = {215},
     number = {3},
     year = {1974},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1974_215_3_a10/}
}