The paper, “On the Shoulders of Giants: The Growing Impact of Older Articles,” by Alex Verstak and six employees of Google Inc. analyzed the age of citations from 1990 to 2013. They report that scholars are citing proportionally more of the older literature. Whats more, the trend appears to be increasing over time.
“Older articles” were defined as being 10 years old or older.
Source: The Scholarly Kitchen
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