@article{105801, author = {Barry J. Gardner}, title = {Ring varieties closed under ideal sums}, journal = {Commentationes Mathematicae Universitatis Carolinae}, volume = {018}, year = {1977}, pages = {569-578}, zbl = {0382.08007}, mrnumber = {0485628}, language = {en}, url = {http://dml.mathdoc.fr/item/105801} }
Gardner, Barry J. Ring varieties closed under ideal sums. Commentationes Mathematicae Universitatis Carolinae, Tome 018 (1977) pp. 569-578. http://gdmltest.u-ga.fr/item/105801/
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