@article{SM_1993_76_2_a3,
     author = {A. A. Klyachin and V. M. Miklyukov},
     title = {Traces of functions with spacelike graphs, and the~extension problem under restrictions on the~gradient},
     journal = {Sbornik. Mathematics},
     pages = {305--316},
     publisher = {mathdoc},
     volume = {76},
     number = {2},
     year = {1993},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1993_76_2_a3/}
}