@article{MZ_1964__85_170296,
     author = {Tibor Sal\'at},
     title = {On subseries.},
     journal = {Mathematische Zeitschrift},
     pages = {209--225},
     publisher = {mathdoc},
     volume = {85},
     year = {1964},
     zbl = {0127.28801},
     url = {http://geodesic.mathdoc.fr/item/MZ_1964__85_170296/}
}