@article{10_4064_sm183_3_3,
     author = {Carlos E. Kenig and Wolfgang Staubach},
     title = {$\Psi $-pseudodifferential operators and estimates for
 maximal oscillatory integrals},
     journal = {Studia Mathematica},
     pages = {249--258},
     publisher = {mathdoc},
     volume = {183},
     number = {3},
     year = {2007},
     doi = {10.4064/sm183-3-3},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm183-3-3/}
}