@article{SM_1989_62_1_a6,
     author = {R. A. Airapetyan},
     title = {Extension of {CR-functions} from piecewise smooth {CR-manifolds}},
     journal = {Sbornik. Mathematics},
     pages = {111--120},
     publisher = {mathdoc},
     volume = {62},
     number = {1},
     year = {1989},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1989_62_1_a6/}
}