@article{SM_1971_14_4_a2,
     author = {D. I. \`Eidel'kind},
     title = {Verbal products of {Magnus} groups},
     journal = {Sbornik. Mathematics},
     pages = {501--524},
     publisher = {mathdoc},
     volume = {14},
     number = {4},
     year = {1971},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1971_14_4_a2/}
}