integration with bookends, papers and athens

Greetings and congratulations for the most perfect software for scientific writing !!!
Is there anywhere I can find instructions on

  1. how to integrate Scrivener with Bookends software to import and/or export the list of document references (from Scrivener Research or draft) specially to a reference database / bibliography such as Bookends
  2. how to import and/or export pdf papers listed in a database software like Papers to the document references list in Scrivener draft / research
  3. how to download a list from research paper indexing site like athens / medline

Many thanks for your prompt attention and reply.
Best Wishes
VG