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Pinfield, S.; Salter, J.; Bath, P.A.; Hubbard, B.; Millington, P.; Anders, J.H.S.; Hussain, A.: Open-access repositories worldwide, 2005-2012 : past growth, current characteristics, and future possibilities (2014)
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Thomas, C.; McDonald, R.H.; McDowell, C.S.: Overview - Repositories by the numbers (2007)
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Abad-García, M.-F.; González-Teruel, A.; González-Llinares, J.: Effectiveness of OpenAIRE, BASE, Recolecta, and Google Scholar at finding spanish articles in repositories (2018)
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Bundza, M.: ¬The choice is yours! : researchers assign subject metadata to their own materials in institutional repositories (2014)
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Björk, B.-C.; Laakso, M.; Welling, P.; Paetau, P.: Anatomy of green open access (2014)
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