| pmApi2df | Convert xml PubMed bibliographic data into a dataframe |
| pmApiRequest | Gather bibliographic content from PubMed database using NCBI entrez APIs |
| pmCitedBy | Find articles that cite a given PubMed article |
| pmCollect | Collect and process PubMed bibliographic data in one step |
| pmEnrichCitations | Enrich a PubMed dataframe with citation data |
| pmFetchById | Fetch PubMed records by PMID |
| pmQueryBuild | Build a PubMed search query programmatically |
| pmQueryTotalCount | Count the number of documents returned by a query |
| pmReferences | Find references cited by a given PubMed article |