TY  - JOUR
AU  - Pietro Aiena
AU  -  
TI  - On inessential and improjective operators.
JO  - Studia Mathematica
PY  - 1998
SP  - 271
EP  - 287
VL  - 131
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/sm-131-3-271-287/
DO  - 10.4064/sm-131-3-271-287
LA  - en
ID  - 10_4064_sm_131_3_271_287
ER  -