%0 Journal Article %A Peter B. Shalen %T Separating, Incompressible Surfaces in 3-Manifolds. %J Inventiones mathematicae %D 1979 %P 105-126 %V 52 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM_1979__52_142642/ %G en %F IM_1979__52_142642