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      <subfield code="a">Díaz Díaz, Jesús Ildefonso</subfield>
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      <subfield code="c">1996</subfield>
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      <subfield code="a">The paper studies the approximate controllability for the Burgers equation. Due to the presence of a superlinear term, an obstruction phenomenon arises which implies a lack of approximate controllability in spaces of type L^p or $C$. However, the author is able to prove several controllability results under suitable constraints on the desired state. Finally, a necessary condition for the approximate controllability of the Navier-Stokes system on a rectangle is given.</subfield>
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      <subfield code="a">https://hdl.handle.net/20.500.14352/60562</subfield>
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      <subfield code="a">http://www.crcpress.com/product/isbn/9780824796075</subfield>
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      <subfield code="a">Obstruction and some approximate controllability results for the burgers equation and related problems</subfield>
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