@article{MAN_1980__248_163366,
     author = {Norbert Ortner},
     title = {Faltung hypersingul\"arer {Integraloperatoren.}},
     journal = {Mathematische Annalen},
     pages = {19--46},
     publisher = {mathdoc},
     volume = {248},
     year = {1980},
     zbl = {0412.46036},
     url = {http://geodesic.mathdoc.fr/item/MAN_1980__248_163366/}
}