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Three periodic solutions to an eigenvalue problem for a class of second-order Hamiltonian systems
Published 2003-01-01Get full text
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Products of derivations which act as Lie derivations on commutators of right ideals
Published 2006-01-01Get full text
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Some counterexamples and properties on generalizations of Lindelöf spaces
Published 1996-01-01Get full text
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