Crossref makes research outputs easy to find, cite, link, assess, and reuse. Crossref is a not-for-profit membership organization that exists to make scholarly communications better. A digital object identifier (DOI) is a persistent identifier or handle used to identify objects uniquely, standardized by the International Organization for Standardization.
Scilit is a comprehensive content aggregator platform for scholarly publications. It is developed and maintained by the open access publisher MDPI AG . It is offered for free to scientists, scholars and the interested general public. Using widely automated approaches to sourcing and curating data, we cover newly published content from a variety of data sources within hours or days. Scilit currently covers journal articles, book chapters, monographs and preprints.
Google Scholar is a freely accessible web search engine that indexes the full text of scholarly literature across an array of publishing formats and disciplines.
Academia.edu is a platform for academics to share research papers. Academia.edu is to accelerate the world's research. Academia.edu is a participant in the open science or open access movements, responding to a perceived need in science for instant distribution of research and the need for a peer-review system that occurs alongside distribution, instead of occurring before it.
