[3] Datetimes. The draft ISO 8601-201x and EDTF. · Issue #656 · plk/biblatex · GitHub, https://github.com/plk/biblatex/issues/656
[1] Should we create an Open Datetime Format? · Issue #1 · JohnLukeBentley/open-datetime-standard-bootstrap () https://github.com/JohnLukeBentley/open-datetime-standard-bootstrap/issues/1
[4] Bibliographic Datetime Format (BDF) - BibliographicDatetimeFormat.pdf, https://raw.githubusercontent.com/JohnLukeBentley/open-datetime-standard-bootstrap/v0.1.2-draft/BibliographicDatetimeFormat.pdf
[2] open-datetime-standard-bootstrap/BibliographicDatetimeFormat.pdf at master · JohnLukeBentley/open-datetime-standard-bootstrap () https://github.com/JohnLukeBentley/open-datetime-standard-bootstrap/blob/master/BibliographicDatetimeFormat.pdf