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@article{MM2_1970__3_154008, author = {Robert A. McGuigan}, title = {On the connectedness of isomorphism classes.}, journal = {Manuscripta mathematica}, pages = {1--6}, publisher = {mathdoc}, volume = {3}, year = {1970}, zbl = {0194.43404}, url = {http://geodesic.mathdoc.fr/item/MM2_1970__3_154008/} }
Robert A. McGuigan. On the connectedness of isomorphism classes.. Manuscripta mathematica, Tome 3 (1970), pp. 1-6. http://geodesic.mathdoc.fr/item/MM2_1970__3_154008/