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Czechoslovak Conference on Differential Equations and Their Applications. Proceedings, Prague, August 22-26, 1977.
Springer-Verlag, Berlin, 1979.
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Vrkoč, I.: On some stability problems.
(English).
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Differential Equations and Their Applications.
Proceedings of the Conference held in Prague in September 1962.
Publishing House of the Czechoslovak Academy of Sciences, Prague, 1963.
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