@article{TM_1994_207_a10,
     author = {V. A. Iskovskikh and S. L. Tregub},
     title = {Relations in the two-dimensional {Cremona} group over a~nonclosed field},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {123--152},
     publisher = {mathdoc},
     volume = {207},
     year = {1994},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TM_1994_207_a10/}
}