%0 Journal Article %A Anthony Bak %A Masaharu Morimoto %T Equivariant surgery with middle dimensional singular sets. I. %J Forum mathematicum %D 1996 %P 267-302 %V 8 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/FORUM_1996__8_3_141769/ %F FORUM_1996__8_3_141769