@article{CHEB_2013_14_3_a16,
     author = {E. A. Tumanova},
     title = {Certain conditions of the root-class residuality of generalized free products with a normal amalgamated subgroup},
     journal = {\v{C}eby\v{s}evskij sbornik},
     pages = {134--141},
     publisher = {mathdoc},
     volume = {14},
     number = {3},
     year = {2013},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/CHEB_2013_14_3_a16/}
}