@article{TVP_1963_8_3_a11,
     author = {Peter D. Lax},
     title = {On the {Regularity} of {Spectral} {Densities}},
     journal = {Teori\^a vero\^atnostej i ee primeneni\^a},
     pages = {337--340},
     publisher = {mathdoc},
     volume = {8},
     number = {3},
     year = {1963},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TVP_1963_8_3_a11/}
}