| retractcheck-package | retractcheck: Retraction scanner |
| check_doi | Check for valid DOI |
| construct_or_url | OpenRetractions URL |
| find_doi | Find DOIs in strings |
| get_date | Convert timestamp to Date |
| query_or | Query <URL: http://openretractions.com> for retractions |
| retractcheck | retractcheck: Retraction scanner |
| retractcheck_dir | Check files in directory for retractions |
| retractcheck_docx | Check docx file for retractions |
| retractcheck_html | Check html file for retractions |
| retractcheck_pdf | Check pdf file for retractions |
| retractcheck_rtf | Check rtf file for retractions |
| retractcheck_txt | Check txt file for retractions |