Proceedings of the National Academy of Sciences of the United States of America
11.1(top 1%)
Impact Factor
12.1(top 1%)
extended IF
945(top 1%)
H-Index
95,625
authors
147,450
papers
16,372,021
citations
32,451
citing journals
1,335,337
citing authors
Selected Period:
The graph shows the number of publications with a given number of citations of Proceedings of the National Academy of Sciences of the United States of America. The data are presented on a logarithmic scale for the sake of clarity.
How are inpact factors calculated?
The impact factor (IF) is calculated by counting citations from peer-reviewed journals only.
extended IF also counts citations from books and conference papers. However, no patent, abstract, working papers, online documents, etc., are covered.
