TY  - JOUR
AU  - A. Alexiewicz
TI  - On sequences of operations (IV)
JO  - Studia Mathematica
PY  - 1951
SP  - 93
EP  - 101
VL  - 12
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/sm-12-1-93-101/
DO  - 10.4064/sm-12-1-93-101
LA  - en
ID  - 10_4064_sm_12_1_93_101
ER  -