@article{RM_1999_54_5_a12,
     author = {A. E. Pankratiev},
     title = {Infinite periodic factor groups of hyperbolic products},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {1035--1036},
     publisher = {mathdoc},
     volume = {54},
     number = {5},
     year = {1999},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1999_54_5_a12/}
}