TY  - JOUR
AU  - Trlifaj, Jan
TI  - $E$-rings and differential polynomials over universal fields
JO  - Commentationes Mathematicae Universitatis Carolinae
PY  - 1982
SP  - 159
EP  - 166
VL  - 23
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/CMUC_1982__23_1_a12/
LA  - en
ID  - CMUC_1982__23_1_a12
ER  -