%0 Journal Article %A D.B.A. Epstein %T Factorization of 3-manifolds. %J Commentarii mathematici Helvetici %D 1961 %P 91-102 %V 36 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMH_1961__36_139230/ %F CMH_1961__36_139230