%0 Journal Article %A Bachman, David %T Topological Index Theory for surfaces in 3–manifolds %J Geometry & topology %D 2010 %P 585-609 %V 14 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.2140/gt.2010.14.585/ %R 10.2140/gt.2010.14.585 %F GT_2010_14_1_a12