@misc{MZ_1925__23_167849,
     title = {Szeg\"o, {G.,} {\"Uber} einen {Satz} von {A.} {Markoff}},
     journal = {Mathematische Zeitschrift},
     pages = {45--61},
     publisher = {mathdoc},
     volume = {23},
     year = {1925},
     url = {http://geodesic.mathdoc.fr/item/MZ_1925__23_167849/}
}