@article{SM_2018_209_10_a4,
     author = {Sh. T. Tetunashvili},
     title = {Universal series and subsequences of functions},
     journal = {Sbornik. Mathematics},
     pages = {1498--1532},
     year = {2018},
     volume = {209},
     number = {10},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2018_209_10_a4/}
}