@article{VMUMM_1991_4_a21,
     author = {F. K. Kabdikairov},
     title = {On relations in the two-dimensional {Cremona} group over a nonclosed {field.~II}},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {81--83},
     year = {1991},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1991_4_a21/}
}