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@article{IM_1983__71_142986, author = {A. Ramanathan}, title = {Deformations of {Principal} {Bundles} on the {Projective} {Line.}}, journal = {Inventiones mathematicae}, pages = {165--192}, publisher = {mathdoc}, volume = {71}, year = {1983}, zbl = {0492.14007}, url = {http://geodesic.mathdoc.fr/item/IM_1983__71_142986/} }
A. Ramanathan. Deformations of Principal Bundles on the Projective Line.. Inventiones mathematicae, Tome 71 (1983), pp. 165-192. http://geodesic.mathdoc.fr/item/IM_1983__71_142986/