你即將離開本站

並前往https://cran.r-project.org/web/packages/roadoi/vignettes/intro.html

Introduction

Unpaywall uses different data sources to find open access full-texts including: Crossref: a DOI registration agency serving major scholarly ...

確定！ 回上一頁

查詢 「Unpaywall」的人也找了：

  1. Unpaywall
    2.
  2. CORE ac UK
    3.
  3. Google Scholar
    4.
  4. Unpaywall Chrome
    5.
  5. Free Journal
    6.
  6. Sci-Hub
    7.
  7. EndNote Click
    8.
  8. Kopernio
    9.