@article{10_4064_sm_132_2_125_139,
     author = {Allan Greenleaf, Andreas Seeger},
     title = {On oscillatory integral operators with folding canonical relations},
     journal = {Studia Mathematica},
     pages = {125--139},
     publisher = {mathdoc},
     volume = {132},
     number = {2},
     year = {1999},
     doi = {10.4064/sm-132-2-125-139},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm-132-2-125-139/}
}