utexas.edu/users/selim">Selim Erdogan</a>,
<a href="http://www.cs.utexas.edu/users/appsmurf">Joohyung Lee</a>,
<a href="http://www.cs.utexas.edu/users/vl">Vladimir Lifschitz</a>
and
<a href="http://www.d.umn.edu/~hudson">Hudson Turner</a>
(<i>Artificial Intelligence</i>, Vol.&nbsp;153, 2004, pp.&nbsp;105-140)
 <ul>
  <li>The <a href="zoo/zoo-landscape">landscape</a>,
          <a href="zoo/zoo-animals">animals</a>,
          <a href="zoo/zoo-movement">movement</a> and
          <a href="zoo/zoo-actions">act