@article{CMH_1937__10_138694,
     author = {Fritz Blumer},
     title = {\"Uber das {Wachstum} der {N\"aherungsnenner} halbregelm\"a{\ss}iger {Kettenbr\"uche.}},
     journal = {Commentarii mathematici Helvetici},
     pages = {97--109},
     publisher = {mathdoc},
     volume = {10},
     year = {1937},
     zbl = {0018.00801},
     url = {http://geodesic.mathdoc.fr/item/CMH_1937__10_138694/}
}