TY - JOUR AU - Greenleaf, Allan AU - Uhlmann, Gunther TI - Composition of some singular Fourier integral operators and estimates for restricted $X$-ray transforms JO - Annales de l'Institut Fourier PY - 1990 SP - 443 EP - 466 VL - 40 IS - 2 PB - Institut Fourier PP - Grenoble UR - https://aif.centre-mersenne.org/articles/10.5802/aif.1220/ DO - 10.5802/aif.1220 LA - en ID - AIF_1990__40_2_443_0 ER -