1. Spectral interpolation;Albrecht,1984
2. Mappings between function spaces;Bartle;Trans. Amer. Math. Soc.,1952
3. Upper and lower Fredholm spectra;Buoni,1977
4. Fredholm and Invertible Tuples of Bounded Linear Operators;Curto;Thesis State University of New York at Stony Brook,1978
5. A stability of Fredholm complexes of Banach spaces with respect to perturbations which are small in q-norm;Fainstain;Izv. Akad. Nauk Azerbaidzhan. SSR Ser. Fiz.-Tekhn. Mat. Nauk,1980