@article{SM_2013_204_2_a3,
     author = {A. O. Zakharov},
     title = {An estimate for the rank of the intersection of subgroups in free amalgamated products of two groups with normal finite amalgamated subgroup},
     journal = {Sbornik. Mathematics},
     pages = {223--236},
     year = {2013},
     volume = {204},
     number = {2},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2013_204_2_a3/}
}