TY  - JOUR
AU  - Almeida, P.
TI  - A direct approach to one variable noncommutative calculus
JO  - Portugaliae mathematica
PY  - 1989
SP  - 97
EP  - 114
VL  - 46
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/PORMA_1989__46_1_115653/
LA  - en
ID  - PORMA_1989__46_1_115653
ER  -