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Jahn, N.; Matthias, L.; Laakso, M.: Toward transparency of hybrid open access through publisher-provided metadata : an article-level study of Elsevier (2022)
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Laakso, M.; Matthias, L.; Jahn, N.: Open is not forever : a study of vanished open access journals (2021)
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- Jahn, N. 2
- Laakso, M. 2