[1] Book Interchange Tag Set (BITS): https://jats.nlm.nih.gov/extensions/bits/

[2] Chicago Manual of Style: http://www.chicagomanualofstyle.org/home.html

[3] Citing Medicine (2nd Edition): https://www.ncbi.nlm.nih.gov/books/NBK7256/

[4] CrossRef: https://www.crossref.org/

[5] DOI: https://www.doi.org/

[6] Harvard Style (Imperial College London guide): https://www.imperial.ac.uk/media/imperial-college/administration-and-support-services/library/public/harvard.pdf

[7] Initiative for Open Citations (I4OC): https://i4oc.org/

[8] OpenURL (ANSI/NISO Z39.88-2004 (R2010)): https://www.niso.org/publications/z3988-2004-r2010-openurl-framework-context-sensitive-services

[9] PubMed: https://www.ncbi.nlm.nih.gov/pubmed/

[10] Zotero: https://www.zotero.org/