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. 2014 Dec 26;9(12):e115253. doi: 10.1371/journal.pone.0115253

Table 3. Characterization of URI references in STM articles per corpus.

# URI references arXiv Elsevier PMC total
1 total Inline graphic Inline graphic Inline graphic Inline graphic
2 excluded Inline graphic Inline graphic Inline graphic Inline graphic
3 to articles Inline graphic Inline graphic Inline graphic Inline graphic
4 to web at large 346,177 232,712 480,853 1,059,742