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 number of publications of Proceedings of the National Academy of Sciences of the United States of America per year and the number of citations of papers published in the same year. Note that this is not the total number of citations the journal received in year x, but the number of citations papers published in year x received in the subsequent years.
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.
