Kilder
Eysenbach, G. 2006. Citation advantage of open access articles. PLOS BIOLOGY 4 (5):692-698.
Kousha, K, and M Thelwall. 2008. Sources of Google Scholar citations outside the Science Citation Index: A comparison between four science disciplines. SCIENTOMETRICS 74 (2):273-294.
Lawrence, S. 2001. Free online availability substantially increases a paper's impact. NATURE 411 (6837):521-521.
Moed, HF. 2007. The effect of "Open access" on citation impact: An analysis of ArXiv's condensed matter section. JOURNAL OF THE AMERICAN SOCIETY FOR INFORMATION SCIENCE AND TECHNOLOGY 58 (13):2047-2054.
Norris, M, C Oppenheim, and F Rowland. 2008. The citation advantage of open-access articles. JOURNAL OF THE AMERICAN SOCIETY FOR INFORMATION SCIENCE AND TECHNOLOGY 59 (12):1963-1972.
Zhang, Y. J. 2006. The effect of open access on citation impact: A comparison study based on web citation analysis. Libri 56 (3):145-156.
