Base (Bielefeld Academic Search Engine)

BASE is one of the world's most voluminous search engines especially for academic web resources. BASE provides more than 240 million documents from more than 8,000 content providers. You can access the full texts of about 60% of the indexed documents for free (Open Access). BASE is operated by Bielefeld University Library.

Fuente: What is BASE? [Disponible en:  https://www.base-search.net/].

CiteSeerX

CiteSeerx is an evolving scientific literature digital library and search engine that has focused primarily on the literature in computer and information science.

Fuente: About CiteSeerX [Disponible en: https://citeseerx.ist.psu.edu/index].

Core (JISC)

CORE’s mission is to aggregate all open access research worldwide and deliver unrestricted access for all.

In doing so, we:

• enrich scholarly data using state-of-the-art text and data mining technologies to aid discoverability,
• enable others to develop new tools and use cases on top of the CORE platform,
• support the network of open access repositories and journals with innovative technical, solutions and,
• facilitate a scalable, cost-effective route for the delivery of open scholarship.

Fuente : About Core [Disponible en : https://core.ac.uk/].

Microsoft Academic Search

Microsoft Académico es un motor de búsqueda web público y libre para literatura y publicaciones científicas, desarrollado por Microsoft Research. Reemplaza el proyecto de búsqueda de Microsoft “Live Search Academic”, que dejó de funcionar en 2012.​ Con su nuevo nombre fue lanzado en 2016, con un nuevo diseño y motor de búsqueda, utilizando tecnologías de búsqueda semántica. Contiene un índice para más de 220 millones de publicaciones, 88 millones de los cuales son artículos de revistas científicas.

Fuente : Wikipedia

Semantic Scholar

Semantic Scholar is a free, AI-powered research tool for scientific literature, based at the Allen Institute for AI.

Staying up-to-date with scientific literature is an increasingly pressing challenge for scholars.Our mission is to accelerate scientific breakthroughs using AI. Semantic Scholar is and always will be open and free for all to use.

Fuente : About Semantic Scholar [Disponible en : https://www.semanticscholar.org/].