@article{02121232,
title = {Ascent, descent, quasi-nilpotent part and analytic core of operators.},
journal = {Matematichki Vesnik},
volume = {54},
year = {2002},
pages = {57-70},
zbl = {1067.47004},
language = {en},
url = {http://dml.mathdoc.fr/item/02121232}
}
Aiena, Pietro; Biondi, Maria Teresa. Ascent, descent, quasi-nilpotent part and analytic core of operators.. Matematichki Vesnik, Tome 54 (2002) pp. 57-70. http://gdmltest.u-ga.fr/item/02121232/