@article{paperid:1049117,
author = {Rostamani, Mohadeseh and Hejazian, Shirin},
title = {Maps preserving Fredholm or semi-Fredholm elements relative to some ideal},
journal = {CUBO, A Mathematical Journal},
year = {2015},
volume = {17},
number = {1},
month = {March},
issn = {0716-7776},
pages = {29--40},
			numpages = {11},
keywords = {Linear Preservers; Fredholm element; semi-Fredholm element; inessential ideal; relative Calkin algebra},
}