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Crossref Metadata Search is a public service that allows users to search metadata for a range of research outputs including journal articles, books, standards, and datasets. It supports queries using DOIs, ORCID iDs, ISSNs, full citations, and custom search terms, and provides example queries to guide user searches.
CiteMe is a citation generator that formats references in APA, MLA, Harvard, Chicago, and many other styles. Users paste a DOI, ISBN, URL, or title, and the tool reviews the metadata source before formatting. It searches scholarly databases such as OpenAlex, CrossRef, and PubMed. A free plan is offered, with a Pro tier adding batch PDF import and exports.
PyPaperBot is a Python tool for downloading scientific papers using Google Scholar, Crossref, SciHub, and SciDB.
