TY  - JOUR
AU  - V. N. Zhelyabin
AU  - A. A. Popov
AU  - I. P. Shestakov
TI  - The coordinate ring of an $n$-dimensional sphere and some examples of differentially simple algebras
JO  - Algebra i logika
PY  - 2013
SP  - 416
EP  - 434
VL  - 52
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/AL_2013_52_4_a1/
LA  - ru
ID  - AL_2013_52_4_a1
ER  -