Yandell K. Scientists take aim at impact factor. The Scientist Magazine May 20, 2013
Many organizations involved in scientific publishing have up to now signed a declaration, called the San Francisco Declaration on Research Assessment (DORA), that asks the scientific community (scientists, funding bodies, and others) to put less weight on impact factor. It argues that, within journals, most citations are likely to come from relatively few papers and so the aggregate impact factors do not reflect an individual paper's merit. Impact factors also vary by field of research and do not differentiate between review papers and original research.