Professor Vlastimil Pták died
Miroslav Fiedler, Vladimír Müller (2000)
Czechoslovak Mathematical Journal
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Miroslav Fiedler, Vladimír Müller (2000)
Czechoslovak Mathematical Journal
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Pavla Vrbová, Antonín Vrba (1978)
Czechoslovak Mathematical Journal
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(1966)
Czechoslovak Mathematical Journal
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