@article{MT_2014_17_1_a4,
     author = {K. Zh. Kudaǐbergenov},
     title = {On the definition of the small index property},
     journal = {Matemati\v{c}eskie trudy},
     pages = {123--127},
     publisher = {mathdoc},
     volume = {17},
     number = {1},
     year = {2014},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MT_2014_17_1_a4/}
}