@article{MAT_1957_1_3_a5,
     author = {L. G\r{a}rding},
     title = {On the asymptotic properties of the spectral function belonging to a self-adjoint semi-bounded extension of an elliptic differential operator},
     journal = {Matematika},
     pages = {117--132},
     publisher = {mathdoc},
     volume = {1},
     number = {3},
     year = {1957},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MAT_1957_1_3_a5/}
}