Cited references
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.. toctree::
    :maxdepth: 1
    :hidden:

    packages.networks.co_citation.cited_references.network_metrics
    packages.networks.co_citation.cited_references.network_plot
    packages.networks.co_citation.cited_references.node_degree_data_frame
    packages.networks.co_citation.cited_references.node_degree_plot
    packages.networks.co_citation.cited_references.node_density_plot
    packages.networks.co_citation.cited_references.terms_by_cluster_data_frame