@article{CMH_1976__51_139644,
     author = {Beno Eckmann},
     title = {Aspherical {Manifolds} and {Higher-Dimensional} {Knots}},
     journal = {Commentarii mathematici Helvetici},
     pages = {93--98},
     year = {1976},
     volume = {51},
     zbl = {0321.57010},
     url = {http://geodesic.mathdoc.fr/item/CMH_1976__51_139644/}
}