Studies showing that review articles get more citations

[Jacques Wainer]

I used: 

@Article{reviewpap1,
  author = 	 {Aksnes, D. W.},
  title = 	 {Citation rates and perceptions of scientific contribution},
  journal = 	 {Journal of the American Society for Information Science and Technology},
  year = 	 2006,
  key = 	 2,
  volume = 	 57,
  pages = 	 {169-185},
doi = {10.1002/asi.20262}}


@Article{reviewpap3,
  author = 	 {H. P. F. Peters  and  A. F. J. van Raan},
  title = 	 {On determinants of citation scores: A case study in chemical engineering},
  journal = 	 {Journal of the American Society for Information Science},
  year = 	 1994,
  volume = 	 45,
  number = 	 1,
  pages = 	 {39 - 49}}


as two references to the phenomenon. In this line, does anyone know
of studies that point out that METHODOLOGICAL papers are also cited more
than other research?

Thanks

Jacques Wainer