@article{SM_1968_5_1_a5,
     author = {A. A. Gonchar},
     title = {On a generalized analytic continuation},
     journal = {Sbornik. Mathematics},
     pages = {129--140},
     year = {1968},
     volume = {5},
     number = {1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1968_5_1_a5/}
}