@article{GDZPPN002282984, title = {Untersuchungen \"uber Deformationen.}, journal = {Mathematische Annalen}, volume = {125}, year = {1952}, pages = {19-31}, zbl = {0047.16601}, url = {http://dml.mathdoc.fr/item/GDZPPN002282984} }
Thimm, W. Untersuchungen über Deformationen.. Mathematische Annalen, Tome 125 (1952) pp. 19-31. http://gdmltest.u-ga.fr/item/GDZPPN002282984/