Template:Stallings1963
From Manifold Atlas
J. Stallings, On topologically unknotted spheres., (1963). MRMR0149458 (26 #6946) Zbl 0121.18202
J. Stallings, On topologically unknotted spheres., (1963). MRMR0149458 (26 #6946) Zbl 0121.18202