@article{CMH_1976__51_139659,
     author = {Niklaus B\"uhlmann},
     title = {Konvergenzbetrachtungen bei quasikonformen {Abbildungen} im ... mittels {S\"atzen} von {K.} {Strebel}},
     journal = {Commentarii mathematici Helvetici},
     pages = {301--318},
     publisher = {mathdoc},
     volume = {51},
     year = {1976},
     zbl = {0363.30034},
     url = {http://geodesic.mathdoc.fr/item/CMH_1976__51_139659/}
}