@article{CHEB_2013_14_1_a5,
     author = {E. S. Logacheva},
     title = {Conjugacy problem subgroups in a free piece of infinite cyclic groups},
     journal = {\v{C}eby\v{s}evskij sbornik},
     pages = {61--69},
     publisher = {mathdoc},
     volume = {14},
     number = {1},
     year = {2013},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/CHEB_2013_14_1_a5/}
}