@article{CHEB_2013_14_3_a6,
     author = {V. G. Durnev and O. V. Zetkina and A. I. Zetkina},
     title = {On automorphic reducibility for sets elements of free groups},
     journal = {\v{C}eby\v{s}evskij sbornik},
     pages = {52--55},
     publisher = {mathdoc},
     volume = {14},
     number = {3},
     year = {2013},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/CHEB_2013_14_3_a6/}
}