SBIR on Twitter: "@sbirAECA ya está indexada en @BASEsearch BASE is one of the world's largest search engines especially for academic web resources. BASE is operated by Bielefeld University Library, Germany. https://t.co/ZdApjabrsg
The best academic search engines [2022 update] - Paperpile
What are the Various Types of Academic Search Engines? by CogniBrain - Issuu