J S Birman, On
the equivalence of Heegaard splittings of closed, orientable
3–manifolds, from: "Knots,
groups, and 3–manifolds (Papers dedicated to the memory of R
H Fox)" (editor L P Neuwirth), Ann. of Math. Studies
84, Princeton Univ. Press (1975) 137 MR0375318
3
J S Birman,
The topology of 3–manifolds,
Heegaard distance and the mapping class group of a 2–manifold, from: "Problems on mapping
class groups and related topics" (editor B Farb), Proc. Sympos.
Pure Math. 74, Amer. Math. Soc. (2006) 133 MR2264538
4
W A Bogley,
J H
C Whitehead’s asphericity question, from:
"Two-dimensional homotopy and combinatorial group theory"
(editors C Hog-Angeloni, W Metzler, A J Sieradski), London
Math. Soc. Lecture Note Ser. 197, Cambridge Univ. Press (1993)
309 MR1279184
5
K S Brown,
Cohomology of groups, 87, Springer (1982) MR672956
F R Cohen, J
Wu, On braid groups, free groups, and the loop space of
the 2–sphere, from:
"Categorical decomposition techniques in algebraic topology
(Isle of Skye, 2001)" (editors G Arone, J Hubbuck, R Levi, M
Weiss), Progr. Math. 215, Birkhäuser (2004) 93 MR2039761
8
F R Cohen, J
Wu, On braid groups and
homotopy groups, from: "Groups, homotopy and
configuration spaces" (editors N Iwase, T Kohno, R Levi, D
Tamaki, J Wu), Geom. Topol. Monogr. 13, Geom. Topol. Publ.
(2008) 169 MR2508205
R C Lyndon,
P E Schupp, Combinatorial group theory, 89,
Springer (1977) MR0577064
15
J Milnor, A unique
decomposition theorem for 3–manifolds, Amer. J. Math. 84 (1962) 1
MR0142125
16
J Morgan, G
Tian, Ricci flow and the Poincaré conjecture, 3,
Amer. Math. Soc. (2007) MR2334563
17
C D
Papakyriakopoulos, A reduction of the Poincaré
conjecture to group theoretic conjectures, Ann. of Math.
(2) 77 (1963) 250 MR0145496
18
M Scharlemann,
Heegaard splittings of compact 3–manifolds, from: "Handbook of geometric
topology" (editors R J Daverman, R B Sher),
North-Holland (2002) 921 MR1886684
19
J Stallings, How
not to prove the Poincaré conjecture, Ann. of Math. Study
60 (1966) 83