@article{MS2_1953__1_165504,
     author = {Lars GARDING},
     title = {On the asymptotic distribution of the eigenvalues and eigenfunctions of elliptic differential operators},
     journal = {Mathematica Scandinavica},
     pages = {237--255},
     year = {1953},
     volume = {1},
     zbl = {0053.39102},
     url = {http://geodesic.mathdoc.fr/item/MS2_1953__1_165504/}
}