@article{IM2_1972_6_1_a3,
     author = {Yu. I. Khmelevskii},
     title = {Systems of equations in a~free {group.~II}},
     journal = {Izvestiya. Mathematics},
     pages = {109--180},
     year = {1972},
     volume = {6},
     number = {1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1972_6_1_a3/}
}