@article{GDZPPN002064278,
title = {The equivariant Dehn's lemma and loop theorem.},
journal = {Commentarii mathematici Helvetici},
volume = {56},
year = {1981},
pages = {225-239},
zbl = {0469.57005},
url = {http://dml.mathdoc.fr/item/GDZPPN002064278}
}
Yau, Shing-Tung; Meeks III, W.H. The equivariant Dehn's lemma and loop theorem.. Commentarii mathematici Helvetici, Tome 56 (1981) pp. 225-239. http://gdmltest.u-ga.fr/item/GDZPPN002064278/