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  • × author_ss:"Jahn, N."
  • × author_ss:"Laakso, M."
  1. Jahn, N.; Matthias, L.; Laakso, M.: Toward transparency of hybrid open access through publisher-provided metadata : an article-level study of Elsevier (2022) 0.01 
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  2. Laakso, M.; Matthias, L.; Jahn, N.: Open is not forever : a study of vanished open access journals (2021) 0.01 
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