8

The the arXiv repository contains almost 1 million of scientific articles, whose bibliographic information is accessible through a documented API, including links to other papers.


7

Maybe the rcrossref package for R is helpful. To find the number of citations, You can do things such as library(rcrossref) # returns list: # pap <- cr_works(dois = "10.1371/journal.pone.0042793") # pap$data will be 28-column data frame. cr_citation_count(doi = "10.1371/journal.pone.0042793") Result: doi ...


6

There is also PLOS Public Library of Science http://api.plos.org/solr/faq/#solr_api_examples PLOS is open access.


6

CiteSeerX and DBPL are two of the most commonly used data sets used in the academic literature.


4

Pubmed has data about 23 million biology and medicine papers. Unfortunately I think you need to request access and given US politics at the moment it could take some time till there a human available to give you that access.


4

EDIT 2017 PubMed Central changed all adressess and some methods. Only tips: To bulk access you can use complex FTP procedures similar to the described below in the "OLD" section... Or a simple perl (or shell) script to loop over API. The basic GET API are showed at https://www.ncbi.nlm.nih.gov/pmc/tools/get-full-text/ To GET by shell you must to use ...


3

To update Cristian's answer, with regard to PubMed, you don't need to be from the USA. There are a couple of ways to get the data. 1) PubMed, go to http://www.ncbi.nlm.nih.gov/pubmed/?term=%22all%22%5Bfilter%5D (which today hosts 25M articles - not OpenAccess) choose send to -> file -> abstract or xml. I downloaded the XML which is kind of larger - 298.298....


2

For papers on computational linguistics, there is an archive of 24,300 papers at http://aclweb.org/anthology/ , with an active community interested in better retrieving this data such as DFKI and DERI.


2

RePEc data: http://ideas.repec.org/getdata.html Only economics, but coverage, quality, and ease of access are outstanding.


1

You can request an API key from RePEc. The above link discusses API format and another API for citations.


1

Other than CrossRef alone, OpenCitations might be of help to you as well.


1

For anyone still looking for sources of citation network data, and paper metadata for global cross-disciplinary publications, the Open Academic Graph project from Microsoft and AMiner combines two of the largest indexes, and is free. https://www.openacademic.ai/oag/ If you are interested in downloading full content (i.e. PDF/LaTeX source), then arXiv will ...


1

RePEc https://ideas.repec.org/getdata.html Although for papers in economics alone, RePEc has several advantages for your project: Data is free: http://repec.org/docs/RePEcDataUse.html Full FTP access to the structured data Multiple metrics for authors Broad data coverage


1

I am not sure that you can get everything you are looking for directly, but here are a few sites that have some of the information you're looking for: Cite Seer: http://citeseerx.ist.psu.edu/ Social Science Research Network: http://www.ssrn.com/ Google Scholar: https://scholar.google.com/ Note that the 'free' and 'open' -ness of these sites should be ...


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