@article{MAN_1890__37_157519,
     author = {Dyck},
     title = {Beitr\"age zur {Analysis} situs. {II.} {Aufsatz.} {Mannigfaltigkeiten} von n- {Dimensionen}},
     journal = {Mathematische Annalen},
     pages = {273--316},
     publisher = {mathdoc},
     volume = {37},
     year = {1890},
     zbl = {22.0547.02},
     url = {http://geodesic.mathdoc.fr/item/MAN_1890__37_157519/}
}