The immediacy index and the journal impact factor: Two highly correlated derived measuresby Weiping Yue, Concepcion S Wilson, Ronald Rousseau
Canadian Journal of Information and Library Science (2004)
Volume: 28, Issue: 1, Publisher: Canadian Association for Information Science, Pages: 33-48
http://www.mendeley.com/research/immediacy-index-journal-impact-factor-two-highly-correlated-derived-measures/#