The elliptic differential operators
Bohumil Cenkl (1967)
Commentationes Mathematicae Universitatis Carolinae
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Bohumil Cenkl (1967)
Commentationes Mathematicae Universitatis Carolinae
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Jan Menu, Jan Pavelka (1976)
Commentationes Mathematicae Universitatis Carolinae
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Eichhorn, Jürgen
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Vlastimil Pták (1969)
Commentationes Mathematicae Universitatis Carolinae
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