@article{JRAM_1993__443_153564,
     author = {Alan Adolphson and Steven Sperber},
     title = {Twisted exponential sums and {Newton} polyhedra.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {151--178},
     publisher = {mathdoc},
     volume = {443},
     year = {1993},
     zbl = {0853.11067},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1993__443_153564/}
}