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@article{JRAM_1992__425_153396, author = {F. Acquistapace and F. Broglia}, title = {Signatures and flatness.}, journal = {Journal f\"ur die reine und angewandte Mathematik}, pages = {61--70}, publisher = {mathdoc}, volume = {425}, year = {1992}, zbl = {0758.14041}, url = {http://geodesic.mathdoc.fr/item/JRAM_1992__425_153396/} }
F. Acquistapace; F. Broglia. Signatures and flatness.. Journal für die reine und angewandte Mathematik, Tome 425 (1992), pp. 61-70. http://geodesic.mathdoc.fr/item/JRAM_1992__425_153396/