blob: a68fb982cec4337001c4619a15e26fdcaf64d85a (
plain)
| 1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
 | 
Probably start with:
    crossref (including citations)
    arxiv
    medline
then merge in:
    dblp
    CORE
    oaDOI
    archive.org paper/url manifest
    semantic scholar
and later:
    opencitations
    openlibrary
 |