%0 Journal Article %A Greenleaf, Allan %A Uhlmann, Gunther %T Composition of some singular Fourier integral operators and estimates for restricted $X$-ray transforms %J Annales de l'Institut Fourier %D 1990 %P 443-466 %V 40 %N 2 %I Institut Fourier %C Grenoble %U https://aif.centre-mersenne.org/articles/10.5802/aif.1220/ %R 10.5802/aif.1220 %G en %F AIF_1990__40_2_443_0