The Microsoft Academic Graph is a heterogeneous graph containing scientific publication records,
citation relationships between those publications, as well as authors, institutions, journals,
conferences, and fields of study.
Semantic Scholar is a project developed at the Allen Institute for Artificial Intelligence. Publicly
released in November 2015, it is designed to be an AI-backed search engine for academic publications.
The project uses a combination of machine learning, natural language processing, and machine vision to
add a layer of semantic analysis to the traditional methods of citation analysis, and to extract
relevant figures, entities, and venues from papers. In comparison to Google Scholar and PubMed, Semantic
Scholar is designed to highlight the most important and influential papers, and to identify the
connections between them. (Wikipedia)
We harvest Open Access content from over 50,000 publishers and repositories, and make it easy to find,
track, and use.
Crossref makes research outputs easy to find, cite, link, assess, and reuse. We’re a not-for-profit
membership organization that exists to make scholarly communications better.
OpenCitations is an independent infrastructure organization for open scholarship dedicated to the
publication of open bibliographic and citation data by the use of Semantic Web (Linked Data)
technologies. It is also engaged in advocacy for open citations, particularly in its role as a key
founding member of the Initiative for Open Citations (I4OC).