@article{10_2140_agt_2006_6_2473,
     author = {Niederkr\"uger, Klaus},
     title = {The plastikstufe {\textendash} a generalization of the overtwisted disk to higher dimensions},
     journal = {Algebraic and Geometric Topology},
     pages = {2473--2508},
     year = {2006},
     volume = {6},
     number = {5},
     doi = {10.2140/agt.2006.6.2473},
     url = {http://geodesic.mathdoc.fr/articles/10.2140/agt.2006.6.2473/}
}