@article{SM_2000_191_2_a6,
     author = {N. N. Ural'tseva},
     title = {Contact of a~free boundary with a~fixed boundary},
     journal = {Sbornik. Mathematics},
     pages = {307--315},
     publisher = {mathdoc},
     volume = {191},
     number = {2},
     year = {2000},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2000_191_2_a6/}
}