Open Access Indexes, Indexing Systems, and Directories

- DOAJ

- Latindex (catálogo y Directorio)

- MIAR

- LatinREV

- Mir@bel

Newspaper Archives and Regional Databases

- SciELO (Scientific Electronic Library Online)

- Redalyc

- Dialnet

- Biblat

- CLASE

Search Engines and Open Science Graphs

- OpenAlex

- Electronic Journals Library

- Dimensions

- Crossref

International University Library Catalogs

- REBIUN (España)

- Catálogo DZB (Alemania)

- Catálogo Sudoc (Francia)