citecorp-package        citecorp
oc_coci                 COCI: OpenCitations Index of Crossref open
                        DOI-to-DOI references
oc_dois                 Vector of 25 DOIs (Digital Object Identifiers)
oc_lookup               Methods for getting IDs from other IDs
oc_pmcids               Vector of 8 PMCIDs (PubMed Central Identifiers)
oc_pmids                Vector of 24 PMIDs (PubMed Identifiers)
