1. Aiena, P.: Fredholm and Local Spectral Theory, with Applications to Multipliers. Kluwer Academic Publishers, Dordrecht (2004)
2. Aiena, P.: Quasi-Fredholm operators and localized SVEP. Acta Sci. Math. (Szeged) 73(1–2), 251–263 (2007)
3. Aiena, P., Aponte, E., Balzan, E.: Weyl type Theorems for left and right polaroid operators. Integr. Equ. Oper. Theory 66(1), 1–20 (2010)
4. Arroud, A., Zariouh, H.: Browder-type theorems for direct sums of operators. Funct. Anal. Approx. Comput. 7(1), 77–84 (2015)
5. Berkani, M.: On a class of quasi-Fredholm operators. Integr. Equ. Oper. Theory 34(2), 244–249 (1999)