@article{CHEB_2016_17_2_a7,
     author = {V. G. Durnev and O. V. Zetkina and A. I. Zetkina},
     title = {On equations and inequalities in words and word lengths},
     journal = {\v{C}eby\v{s}evskij sbornik},
     pages = {137--145},
     publisher = {mathdoc},
     volume = {17},
     number = {2},
     year = {2016},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/CHEB_2016_17_2_a7/}
}