TY  - JOUR
AU  - Maciej Szymkat
TI  - The form of the n-th iteration of the operator q=fd/dx
JO  - Mathematica Applicanda
PY  - 1983
SP  -  227
EP  - 249
VL  - 11
IS  - 22
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.14708/ma.v11i22.1591/
DO  - 10.14708/ma.v11i22.1591
LA  - pl
ID  - 10_14708_ma_v11i22_1591
ER  -