@article{MAT_1960_4_6_a0,
     author = {M. Schechter},
     title = {Remarks on elliptic boundary value problems},
     journal = {Matematika},
     pages = {3--22},
     year = {1960},
     volume = {4},
     number = {6},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MAT_1960_4_6_a0/}
}