"we review the scope and the role of preprint papers platforms in academia, we explore individual cases, #arXiv, #SSRN, #OSF Preprints, #HAL, #bioRxiv, #EconStor, #RePEc, #PhilArchive, Research Square, #viXra, Cryptology ePrint Archive, Preprints.org, #ChinaXiv, #medRxiv, #JMIR Preprints, #Authorea, #ChemRxiv, #engrXiv, e-LiS, #SciELO, #PsyArXiv, #F1000 Research, and #Zenodo,

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