gov/pubmed/24723814.0" target="_blank">24723814.0</a></td>
      <td><a href="https://doi.org/10.1155/2014/567246" target="_blank">10.1155/2014/567246</a></td>
      <td>4mad9xws</td>
      <td>0.518178</td>
      <td></td>
      <td><a href="Topic_02.html#vioymdp0">Xie_G_2020</a>, <a href="Topic_05.html#94qom8px">Yang_2018</a></td>
    </tr>
    <tr>
      <th id="62w6gmg3";>16</th>
      <td>Bhadra_2008</td>
      <td>Structure and dynamics of the core US air travel markets: A basic empirical analysis of 