An operator ideal associated to tauberian operators Manuel González Ortiz — 1989 Extracta Mathematicae
Factorization of operators and duality Manuel González Ortiz; Víctor M. Onieva Aleixandre — 1987 Extracta Mathematicae
On incomparability of Banach spaces. Manuel González Ortiz; Víctor M. Onieva Aleixandre — 1986 Extracta Mathematicae
Semi-Fredholm operators and semigroups associated with some classical operator ideals Manuel González Ortiz; Víctor M. Onieva Aleixandre — 1988 Extracta Mathematicae
Lifting results for sequences in Banach spaces Manuel González Ortiz; Víctor M. Onieva Aleixandre — 1988 Extracta Mathematicae