FYI this is CrossRef DOIs, and the data is served by CrossRef. Take a look at our API, e.g. http://api.crossref.org/works/10.5555/12345678 http://api.crossref.o

FYI this is CrossRef DOIs, and the data is served by CrossRef. Take a look at our API, e.g. http://api.crossref.org/works/10.5555/12345678 http://api.crossref.org/works/10.5555/12345678 and http://search.crossref.org http://search.crossref.org Any questions email, us at labs@crossref.org *which are the kinds of DOI you're likely to be citing, but other Registration Agencies and types of DOIs exist