TY  - JOUR
AU  - Wenying, Feng
AU  - Guoxing, Ji
TI  - A Counterexample in the theory of derivations
JO  - Glasgow mathematical journal
PY  - 1989
SP  - 161
EP  - 163
VL  - 31
IS  - 2
UR  - http://geodesic.mathdoc.fr/articles/10.1017/S0017089500007679/
DO  - 10.1017/S0017089500007679
ID  - 10_1017_S0017089500007679
ER  -