@article{DM_1995_7_4_a4,
     author = {V. G. Durnev},
     title = {On equations with subgroup constraints on solutions in free groups},
     journal = {Diskretnaya Matematika},
     pages = {60--67},
     year = {1995},
     volume = {7},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DM_1995_7_4_a4/}
}