@article{GDZPPN002209284, title = {Signatures and flatness.}, journal = {Journal f\"ur die reine und angewandte Mathematik}, volume = {426}, year = {1992}, pages = {61-70}, zbl = {0758.14041}, url = {http://dml.mathdoc.fr/item/GDZPPN002209284} }
Acquistapace, F.; Broglia, F. Signatures and flatness.. Journal für die reine und angewandte Mathematik, Tome 426 (1992) pp. 61-70. http://gdmltest.u-ga.fr/item/GDZPPN002209284/