@article{RM_1968_23_2_a1,
     author = {V. A. Il'in},
     title = {Problems of localization and convergence for {Fourier} series in fundamental systems of functions of the {Laplace} operator},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {59--116},
     publisher = {mathdoc},
     volume = {23},
     number = {2},
     year = {1968},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1968_23_2_a1/}
}