The principle of open access publication is seen by many involved as an alternative publication model. Open access refers to unrestricted access to scientific information on the internet.
Two methods are used here: on the one hand, to archive articles that are published in conventional journals in institutions’ own e-print archives (repositories), which are sustained by the respective institutions (open access green), allowing free access and, on the other, the specific promotion of open access journals (open access gold).
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