The graph shows the number of publications with a given number of citations of Ultrasound in Obstetrics and Gynecology. 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.
