@article{MAT_1960_4_4_a3,
     author = {L. V. H\"ormander},
     title = {On the regularity of the solutions of boundary problems},
     journal = {Matematika},
     pages = {37--74},
     publisher = {mathdoc},
     volume = {4},
     number = {4},
     year = {1960},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MAT_1960_4_4_a3/}
}