Adding bibliographical data from CC0 databases

[csisc]

As I have seen, there are a lack of bibliographical information in WikiCite. However, there are many CC0 datasets that can be used to feed WikiCite data:

• OpenCitations (opencitations.net)
• DBLP (dblp.uni-trier.de)
• Open Academic Graph (https://www.aminer.org/open-academic-graph)
• Microsoft Academic Knowledge Graph (http://ma-graph.org)
• CrossRef (https://www.crossref.org/blog/free-public-data-file-of-112-million-crossref-records/)
  I invite you to integrate this important data to WikiCite.