crossref.orgの競合サイトトップ10

datacite.org

In 2020, the DataCite General Assembly approved the introduction of consortium membership, where a group of like-minded organizations come together to collectively participate in DataCite’s community and governance activities and use DataCite’s DOI services. To limit the gap between the fees for Direct Members and Consortium Organizations and encourage active users to participate in DataCite governance, the fee model included the following provision: 'Consortium Organizations that expect to register more than 10.000 DOIs annually should transfer to Direct Membership within the following calendar year, or pay the additional membership fee (2.000€ annually) while remaining part of the consortium. This ensures that there is appropriate cost recovery based on the impact of cost drivers.'

europepmc.org

europe pmc is an archive of life sciences journal literature.

scholar.google.com

google scholar provides a simple way to broadly search for scholarly literature. search across a wide variety of disciplines and sources: articles, theses, books, abstracts and court opinions.

proquest.com

proquest powers research in academic, corporate, government, public and school libraries around the world with unique content. explore millions of resources from scholarly journals, books, newspapers, videos and more.

onlinelibrary.wiley.com

one of the largest and most authoritative collections of online journals, books, and research resources, covering life, health, social, and physical sciences.

link.springer.com

providing access to millions of research articles and chapters from science, technology and medicine, and humanities and social sciences

sciencedirect.com

sciencedirect is the world's leading source for scientific, technical, and medical research. explore journals, books and articles.