1. On the o-spectrum of regular operators and the spectrum of measures;Arendt;Math. Z.,1981
2. Arendt, W. and D. Hart — Spectral properties of quasi-invertible disjointness preserving operators, J. Funct. Anal., to appear.
3. Arendt, W. and H.U. Schwarz — Ideale regulärer Operatoren und Kompaktheit positiver Operatoren zwischen Banach ver bänden, preprint.
4. Ideals of regular operators on l2;Arendt;Proc. Amer. Math. Soc.,1983
5. The normal solvability of linear equations in normed spaces (Russian);Atkinson;Mat. Sbornik,1951