Bornmann L, Schier H, Marx W, et al. What factors determine citation counts of publications in chemistry besides their quality? Journal of Informetrics 2012;6(1):11-18
This study examined the correlation between citation counts of individual papers and a number of factors, using an extensive data set from the field of chemistry. The study found a statistically significant correlation - independently of the quality of the papers - with the following factors: citation performance of the cited references, reputation of the authors, language of the publishing journal, and chemical subfield, but not with the number of the authors.