Intuitively, one would assume that URI references to journal articles can readily be recognized by detecting HTTP URIs that carry a DOI, e.g., http://dx.doi.org/10.1007/s00799-014-010​8-0. However, it turns out that references rather frequently have a direct link to an article in a publisher's portal, e.g. http://link.springer.com/article/10.1007%2Fs00799-014-0108-0, instead of the DOI link. As a result, URI references to scholarly articles were recognized as follows: