Indexing and Abstracting

ISSN International Center, Identifier for serials and other continuing resources, in the electronic and print world Requesting an ISSN.

Google Scholar, Google search engine focused and specialized in the search for scientific-academic content and other services (Library, Rankig of journals, Alerts, Researcher Profile). United States of America.

SINTA: Science and Technology Index, Ministry of Research and Technology /National Agency for Research and Innovation Republic of Indonesia

OpenAlex, is an open source platform to index the research literature, journals, researchers and institutions all over the world

WorldCat, a world catalog managed by the Online Computer Library Center, considered the largest online catalog in the world. United States of America.

Crossref, official digital object identifier (DOI) registration agency of the DOI International Foundation. United States of America and United Kingdom.

ROAD, Directory of Open Access Scholarly Resources, provides free access to a set of open access bibliographic records, created by the ISSN Network. ROAD is linked to the actions carried out by the United Nations Organization for Science, Education and Culture (UNESCO) to promote public access to scientific resources. ROAD is a complement to GOAP (Global Open Access Portal), developed by UNESCO. This portal presents the state of scientific information in open access (free and free) around the world. France.

BASE, Bielefeld Academic Search Engine, one of the largest search engines in the world, especially for academic web resources. BASE provides more than 150 million documents from more than 7,000 sources. BASE is operated by the Bielefeld University Library. Germany.

OpenAIRE, Open Access Infrastructure for Research in Europe, technological and services infrastructure created to support, accelerate and measure the correct implementation of European policies on open access to scientific publications and research data. European Union.

DRJI, Directory of Research Journals Indexing, free online service for searching web resources. India.