@article{MZ_1923__17_167733,
     author = {O. Perron},
     title = {\"Uber einen {Grenzwertsatz}},
     journal = {Mathematische Zeitschrift},
     pages = {149--152},
     publisher = {mathdoc},
     volume = {17},
     year = {1923},
     zbl = {49.0306.02},
     url = {http://geodesic.mathdoc.fr/item/MZ_1923__17_167733/}
}