@article{MAN_1969__181_161825,
     author = {W. PHILIPP and O.P. STACKELBERG},
     title = {Zwei {Grenzwerts\"atze} f\"ur {Kettenbr\"uche.}},
     journal = {Mathematische Annalen},
     pages = {152--156},
     publisher = {mathdoc},
     volume = {181},
     year = {1969},
     url = {http://geodesic.mathdoc.fr/item/MAN_1969__181_161825/}
}