@article{IM2_1985_25_1_a6,
     author = {A. A. Razborov},
     title = {On~systems of equations in a~free group},
     journal = {Izvestiya. Mathematics },
     pages = {115--162},
     publisher = {mathdoc},
     volume = {25},
     number = {1},
     year = {1985},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1985_25_1_a6/}
}