1. Fredholm and Local Spectral Theory, with Application to Multipliers;Aiena,2004
2. Classes of operators satisfying a-Weyl's theorem;Aiena;Studia Math.,2005
3. Operators which have a closed quasi-nilpotent part;Aiena;Proc. Amer. Math. Soc.,2002
4. P. Aiena, J. R. Guillen, Weyl's theorem for perturbations of paranormal operators, Proc. Amer. Math. Soc (2005), in press
5. A variation on Weyl's theorem;Aiena;J. Math. Anal. Appl.,2006