@article{SM_1972_18_1_a9,
     author = {A. A. Gonchar},
     title = {A local condition of single-valuedness of analytic functions},
     journal = {Sbornik. Mathematics},
     pages = {151--167},
     publisher = {mathdoc},
     volume = {18},
     number = {1},
     year = {1972},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1972_18_1_a9/}
}