%0 Journal Article %A Yibiao Pan %A Christopher D. Sogge %T Oscillatory integrals associated to folding canonical relations %J Colloquium Mathematicum %D 1990 %P 413-419 %V 60 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/cm-60-61-2-413-419/ %R 10.4064/cm-60-61-2-413-419 %G en %F 10_4064_cm_60_61_2_413_419