{{doi-inline|doi|text|doi-access=free}}
will link text to the object identified by doi. If no text is given, it will produce [n], as if you had linked it directly using [https://doi.org/doi].
If you mark it with |doi-access=free
, it will add a green free-access lock next to the link.
The {{doi-inline|10.1007/b62130|Red Book of Varieties and Schemes}}. The Red Book of Varieties and Schemes {{doi-inline|10.1007/b62130}}. In {{doi-inline|10.1038/495426a|an article by Richard van Noorden|doi-access=free}}, ... In an article by Richard van Noorden {{doi-inline|10.1038/495426a|doi-access=free}}, ...
gives:
In PDFs these will be: