@article{SM_2019_210_11_a2,
     author = {V. I. Buslaev},
     title = {Schur's criterion for formal power series},
     journal = {Sbornik. Mathematics},
     pages = {1563--1580},
     year = {2019},
     volume = {210},
     number = {11},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2019_210_11_a2/}
}