code: def cocitation(corpus, min_weight=1, edge_attrs=['ayjid', 'date'], **kwargs):
      
      return cooccurrence(corpus, 'citations', min_weight=min_weight,
                          edge_attrs=edge_attrs, **kwargs)
docs: Generate a cocitation network.
  
      A **cocitation network** is a network in which vertices are papers, and
      edges indicate that two papers were cited by the same third paper.
      `CiteSpace
      <http://cluster.cis.drexel.edu/~cchen/citespace/doc/jasist2006.pdf>`_
      is a popular desktop application for co-citation analysis, and you can read
      about the theory behind it
      `here <http://cluster.cis.drexel.edu/~cchen/citespace/>`_.