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@article{MAN_1993__297_3_165126, author = {M. Andreatta and E. Ballico}, title = {Two theorems on elementary contractions.}, journal = {Mathematische Annalen}, pages = {191--198}, publisher = {mathdoc}, volume = {297}, number = {3}, year = {1993}, zbl = {0789.14011}, url = {http://geodesic.mathdoc.fr/item/MAN_1993__297_3_165126/} }
M. Andreatta; E. Ballico. Two theorems on elementary contractions.. Mathematische Annalen, Tome 297 (1993) no. 3, pp. 191-198. http://geodesic.mathdoc.fr/item/MAN_1993__297_3_165126/