%0 Journal Article %A R.B. Melrose %A K.G. Andersson %T The Propagation of Singularities along Gliding Rays. %J Inventiones mathematicae %D 1977 %P 197-232 %V 41 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM_1977__41_142491/ %F IM_1977__41_142491