C. Beckett and S. Inger, Self-­?Archiving and Journal Subscriptions: Co-­?Existence ot Competition? An International Survey of Librarians' Preferences

M. Philip, . Davis, V. Bruce, . Lewenstein, H. Daniel et al., Open access publishing, article downloads, and citations: randomized controlled trial, BMJ, vol.337, p.568, 2008.

R. Snijder, The profits of free books: an experiment to measure the impact of open access publishing, Learned Publishing, vol.23, issue.4, pp.293-301, 2010.
DOI : 10.1087/20100403

M. Julia and . Wallace, PEER: Green open access ? insight and evidence, Learned Publishing, vol.24, issue.4, pp.267-277, 2011.