@article{SM_1971_15_2_a4,
     author = {Ya. A. Roitberg},
     title = {On boundary values of generalized solutions of elliptic equations},
     journal = {Sbornik. Mathematics},
     pages = {241--260},
     publisher = {mathdoc},
     volume = {15},
     number = {2},
     year = {1971},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1971_15_2_a4/}
}