| can_api | Test whether API can be reached |
| crlite-package | crlite: Lightweight R wrapper for the Crossref REST API |
| is_email_address | Validate email |
| pipe | Pipe operator |
| plus | Accessing the plus API pool |
| polite | Accessing the polite API pool |
| pools | Accessing different Crossref API pools |
| req_cr | Use the Crossref REST API |
| req_user_agent_cr | Set a user agent |
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