The best replacement for doi is pmid.


The best alternatives to doi are rated as following:
★★★★★  pmid
★★★★  url
★★★★  doc
★★★★  issn
★★★  handle
★★★  jankovic
★★★  isbn
★★★  doi
★★  accession number
★  date krumm
★  puchkova
★  pii
★  masato yoshino
  krumm

Your alternative for doi is not listed? Suggest!
Speaking about doi, one probably shouldn't forget about apa format.

Other search terms related to doi and their ratings are:

★★★★★ apa format
★★★★★ apa
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doi
pmid
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