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      <record key="001" att1="001" value="LIB90444210X" att2="LIB90444210X">001   LIB90444210X</record>
      <field key="010" subkey="">LIB904439501</field>
      <field key="037" subkey="x">englisch</field>
      <field key="050" subkey="x">Aufsatz, Sammelband</field>
      <field key="090" subkey="">026</field>
      <field key="100" subkey="">sonnevend, gy.</field>
      <field key="331" subkey="">existence and numerical computation of extremal invariant sets in linear differential games with bounded controls</field>
      <field key="544" subkey="n">9007-A/I;26</field>
      <field key="596" subkey="a">251 - 260</field>
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