@article{MAN_1915__76_158705,
     author = {O. Sz\'asz},
     title = {\"Uber {Irrationalit\"at} gewisser unendlicher {Reihen}},
     journal = {Mathematische Annalen},
     pages = {485--489},
     publisher = {mathdoc},
     volume = {76},
     year = {1915},
     zbl = {45.0340.01},
     url = {http://geodesic.mathdoc.fr/item/MAN_1915__76_158705/}
}