TY  - JOUR
AU  - Piotr J/edrzejewicz
TI  - On rings of constants of derivations
 in two variables in positive characteristic
JO  - Colloquium Mathematicum
PY  - 2006
SP  - 109
EP  - 117
VL  - 106
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/cm106-1-9/
DO  - 10.4064/cm106-1-9
LA  - en
ID  - 10_4064_cm106_1_9
ER  -