@article{MAN_1915__76_158697,
     author = {Ph. Frank and G. Pick},
     title = {Distanzsch\"atzungen im {Funktionenraum.} {I.} {(Mit} 17 {Figuren} im {Text).}},
     journal = {Mathematische Annalen},
     pages = {354--375},
     publisher = {mathdoc},
     volume = {76},
     year = {1915},
     zbl = {45.0456.01},
     url = {http://geodesic.mathdoc.fr/item/MAN_1915__76_158697/}
}