EBSCO. Five year journal price increase history (2013-2017) [EB/OL]. (2017-09-27) [2017-12-22]..
[2]
Piwowar H, Priem J, Larivière V, et al. (2017) The State of OA: A large-scale analysis of the prevalence and impact of Open Access articles[DB/OL].[2017-12-22]. .
[3]
Himmelstein DS, Romero AR, McLaughlin SR, et al. (2017) Sci-Hub provides access to nearly all scholarly literature[DB/OL].[2017-12-22]. .
[4]
Schiermeier Q. US court grants Elsevier millions in damages from Sci-Hub[EB/OL].(2017-06-22)[2017-12-22]..
[5]
Jamali H R. Copyright compliance and infringement in ResearchGate full-text journal articles[J]. Scientometrics, 2017, 112: 241.
[6]
McKenzie L.A Nonprofit alternative to ResearchGate. [EB/OL]. (2017-11-09) [2017-12-22]..
[7]
Vogel G.German researchers resign from Elsevier journals in push for nationwide open access. [EB/OL]. (2017-10-13) [2017-12-22]. .