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@article{MAN_1991__290_4_164809, author = {F. Campana}, title = {The class ... is not stable by small deformations.}, journal = {Mathematische Annalen}, pages = {19--30}, publisher = {mathdoc}, volume = {290}, number = {4}, year = {1991}, zbl = {0722.32014}, url = {http://geodesic.mathdoc.fr/item/MAN_1991__290_4_164809/} }
F. Campana. The class ... is not stable by small deformations.. Mathematische Annalen, Tome 290 (1991) no. 4, pp. 19-30. http://geodesic.mathdoc.fr/item/MAN_1991__290_4_164809/