@article{SM_1987_56_1_a7,
     author = {V. A. Ufnarovskii},
     title = {An independence theorem and its consequences},
     journal = {Sbornik. Mathematics},
     pages = {121--129},
     publisher = {mathdoc},
     volume = {56},
     number = {1},
     year = {1987},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1987_56_1_a7/}
}