@article{MAT_1963_7_1_a2,
     author = {J. Peetre},
     title = {Another approach to elliptic boundary problems},
     journal = {Matematika},
     pages = {43--65},
     publisher = {mathdoc},
     volume = {7},
     number = {1},
     year = {1963},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MAT_1963_7_1_a2/}
}