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The decomposability of operators relative to two subspaces. Studia Math. [Internet]. 1993;105:25–36.
Website Katavolos A, Lambrou MS, Papadakis M.
On some algebras diagonalized by {$M$}-bases of {$l^2$}. Integral Equations Operator Theory [Internet]. 1993;17:68–94.
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Properties of quasinilpotents in some operator algebras. Proc. Roy. Irish Acad. Sect. A [Internet]. 1993;93(2):155–170.
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