Resolve "Additional information"

Closes #120 (closed)

• display the keywords, the DOI and the reference URL

assigned to @bodin

requested review from @demariaa

added 2 commits

• aa4ff82c - Resolve "Remove cited by"
• 4903cc0f - Merge branch '125-remove_cited_by_external' into '120_doi-additional_information'

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approved this merge request

merged

mentioned in commit 764cc483