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This study permits us to show an example of a Donaldson symplectic submanifold of dimension eight which is formal simply connected and does not satisfy the hard Lefschetz theorem.engjournal articlehttp://link.springer.com/content/pdf/10.1007%2Fs00209-004-0747-8.pdfhttp://link.springer.com/restricted access51Matemáticas (Matemáticas)12 Matemáticas