From Library Journal
"A new article by Richard Van Noorden, Brendan Mahe & Regina Nuzzo and published on Nature News takes a look at the Top 100 most cited articles of all time (specifically back to 1900). The complete lists are also available as XLS files. The article begins:
"Fifty years ago, Eugene Garfield published the Science Citation Index (SCI), the first systematic effort to track citations in the scientific literature. To mark the anniversary, Nature asked Thomson Reuters, which now owns the SCI, to list the 100 most highly cited papers of all time. The search covered all of Thomson Reuter’s Web of Science, an online version of the SCI that also includes databases covering the social sciences, arts and humanities, conference proceedings and some books. It lists papers published from 1900 to the present day."
Direct link to:
Science Citation Top 100 List (.xls)
Google Scholar Top 100 List (.xls)