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Laakso, M.; Björk, B.-C.: Delayed open access : an overlooked high-impact category of openly available scientific literature (2013)
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- Journal of the American Society for Information Science and Technology. 64(2013) no.7, S.1323-1329
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Björk, B.-C.; Laakso, M.; Welling, P.; Paetau, P.: Anatomy of green open access (2014)
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- Journal of the Association for Information Science and Technology. 65(2014) no.2, S.237-250