@article{SM_2020_211_5_a4,
     author = {K. M. Eminyan},
     title = {Waring's problem in natural numbers of special form},
     journal = {Sbornik. Mathematics},
     pages = {733--749},
     year = {2020},
     volume = {211},
     number = {5},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2020_211_5_a4/}
}