CiteScore measures the average citations received per document published in this title. CiteScore values are based on citation counts in a given year (e.g. 2015) to documents published in three previous calendar years (e.g. 2012 – 14), divided by the number of documents in these three previous years (e.g. 2012 – 14). Impact Factor: 2016: 3.494The Impact Factor measures the average number of citations received in a particular year by papers published in the journal during the two preceding years.