Indexing

1. Google Академия is a freely accessible web search engine that indexes the full text or metadata of scholarly literature across an array of publishing formats and disciplines. Google Scholar index includes most peer-reviewed online journals of Europe and America's largest scholarly publishers. This product provides the citation indexing features. While Google does not publish the size of Google Scholar's index, third-party researchers estimated it to contain roughly 160 million documents (link)

2. Neliti is a research repository that helps researchers and decision makers in Indonesia find research, data and evidence (link)

3. Socionet  is a data aggregator that forms a virtual scientific environment in the spirit of Open Science for creating and using information resources and services addressed to professional scientific communities (link)