Haken, W. Trivial loops in homotopy 3-spheres. (English) Zbl 0153.25703 Ill. J. Math. 11, 547-554 (1967). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Keywords:topology × Cite Format Result Cite Review PDF