@article{JRAM_1984__352_152660,
     author = {Detlef M\"uller},
     title = {Twisted convolutions with {Calder\'on-Zygmund} kernels.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {133--150},
     publisher = {mathdoc},
     volume = {352},
     year = {1984},
     zbl = {0532.43007},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1984__352_152660/}
}