  In this paper, we analyse the current availability of open citations data in
one particular dataset, namely COCI (the OpenCitations Index of Crossref open
DOI-to-DOI citations; http://opencitations.net/index/coci) provided by
OpenCitations. The results of these analyses show a persistent gap in the
coverage of the currently available open citation data. In order to address
this specific issue, we propose a strategy whereby the community (e.g. scholars
and publishers) can directly involve themselves in crowdsourcing open
citations, by uploading their citation data via the OpenCitations
infrastructure into our new index, CROCI, the Crowdsourced Open Citations
Index.
