@article{10_4064_fm202_1_1,
     author = {Michael Levin},
     title = {A $Z$-set unknotting theorem for {N\"obeling} spaces},
     journal = {Fundamenta Mathematicae},
     pages = {1--41},
     publisher = {mathdoc},
     volume = {202},
     number = {1},
     year = {2009},
     doi = {10.4064/fm202-1-1},
     language = {de},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm202-1-1/}
}