@article{106140, author = {Jan Trlifaj}, title = {$E$-rings and differential polynomials over universal fields}, journal = {Commentationes Mathematicae Universitatis Carolinae}, volume = {023}, year = {1982}, pages = {159-166}, zbl = {0509.16014}, mrnumber = {653359}, language = {en}, url = {http://dml.mathdoc.fr/item/106140} }
Trlifaj, Jan. $E$-rings and differential polynomials over universal fields. Commentationes Mathematicae Universitatis Carolinae, Tome 023 (1982) pp. 159-166. http://gdmltest.u-ga.fr/item/106140/
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Rings with trivial orthogonal extension theories, to appear.