%0 Journal Article %A A. O. Zakharov %T An estimate for the rank of the intersection of subgroups in free amalgamated products of two groups with normal finite amalgamated subgroup %J Sbornik. Mathematics %D 2013 %P 223-236 %V 204 %N 2 %U http://geodesic.mathdoc.fr/item/SM_2013_204_2_a3/ %G en %F SM_2013_204_2_a3