Textorius, Björn
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MATHEMATICA SCANDINAVICA Vol. 35 (1974) - Articles
Minimaxprinzipe zur Bestimmung der Eigenwerte $J$-nichtnegativer Operatoren.
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MATHEMATICA SCANDINAVICA Vol. 20 (1967) - Articles
On the Stability of Linear Differential Equations in Spaces with an Indefinite Metric.
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