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@article{JRAM_1981__328_152391, author = {Joachim Wehler}, title = {Versal deformation of {Hopf} surfaces.}, journal = {Journal f\"ur die reine und angewandte Mathematik}, pages = {22--32}, publisher = {mathdoc}, volume = {328}, year = {1981}, zbl = {0459.32009}, url = {http://geodesic.mathdoc.fr/item/JRAM_1981__328_152391/} }
Joachim Wehler. Versal deformation of Hopf surfaces.. Journal für die reine und angewandte Mathematik, Tome 328 (1981), pp. 22-32. http://geodesic.mathdoc.fr/item/JRAM_1981__328_152391/