The ISSRU, using the data of the Institute for Scientific Information’s Science Citation Index for the period from 1981 to 1985, compared the actual number of citations per paper received by publications from a particular nation to the expected number of citations per paper. Citations were counted from 1981 to 1985, so that the effective citation period varies from zero to five years.
“The indicators so obtained,” write the study’s authors, “provide a complex measure of medium range citation impact and citation immediacy for a considerably large population of papers’ even for small countries” (T. Braun, W. Glänzel, A. Schubert, “The newest version of the facts and figures on publication output and relative citation impact of 100 countries, 1981-1985,” Scientometrics, 13 (5- 6), 181-8, May 1988).
The accompanying table lists the top 20 nations in the ISSRU’s ranked list of relative citation performance. The relative citation tation impact of 100 ...