Chemistry graduate student Kunal Keskar's paper on the
silver(I)-catalyzed "click reaction" (Huisgen cycloaddition) currently
ranks as the number one accessed full paper in the European Journal of
Organic Chemistry. The work is a full account of the discovery of the
first examples of ligated silver(I) catalysis in the Huisgen reaction.
A pronounced ligand effect was discovered allowing the authors to
propose a catalytic cycle ascribing a significant role to the
hemi-labile nature of the ligand critical to the success of the
catalyst.

link to most accessed:

http://onlinelibrary.wiley.com/journal/10.1002/(ISSN)1099-0690/homepage/2046_mostaccessed.html