@article{MAN_1882__20_157026,
     author = {Thieme},
     title = {Zur {Construction} des {Polarsystems} einer {Fl\"ache} dritter {Ordnung}},
     journal = {Mathematische Annalen},
     pages = {144--145},
     publisher = {mathdoc},
     volume = {20},
     year = {1882},
     zbl = {14.0558.02},
     url = {http://geodesic.mathdoc.fr/item/MAN_1882__20_157026/}
}