The geography of references in elite articles: Which countries contribute to the archives of knowledge? - Fig 2

<p>Ratios of shares based on (1) cited articles: countries’ shares of references cited in the top-level research (fractionally counted). (2) Published articles: countries’ shares of articles published between 2001 and 2010 (fractionally counted). The countries are categorized as high (a), average (b), and low (c) performers (see <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0194805#pone.0194805.t003" target="_blank">Table 3</a>).